Halloween comes early! Katy Perry flashes underwear in fishnet dress while JoJo Siwa shocks with KISS jumpsuit alongside goth girl Avril Lavigne as they lead arrivals at iHeartRadio Music Awards 2024

A number of theatrically dressed stars descended upon the Dolby Theatre in downtown Los Angeles on Monday for the 2024 iHeartRadio Music Awards. 

Katy Perry, 39, turned heads on the red carpet in a very revealing look. She showcased her trim abs and black underwear in a fishnet dress with side slits. 

The Dark Horse hitmaker completed the look with black high-heel boots, and wore her raven tresses cascading down in light waves. Her sultry dress was tied with red ribbons on the sides.

JoJo Siwa, 20, channeled a KISS band member in dramatic black eye makeup and a rhinestone bedazzled bodysuit with sheer panels. 

Avril Lavigne, 39, was every inch the punk rock queen in a tattered graphic t-shirt, black cargo pants, and lace-up black boots. Her blonde platinum tresses were styled straight, and she wore her signature black eye makeup. 

Rapper Ice Spice, 24, showed a glimpse of her abs in a tiny sheer black bandeau top and form-fitting black maxi skirt. The star — who took home the Best New Hip-Hop Artist award — wore a textured black jacket over her barely-there top.  

The Munch hitmaker accessorized her outfit with a black cross. Her auburn tresses were parted on the side and lightly curled for the evening. 

Pregnant Francesca Farago, 30, thrilled in a one-shoulder black gown with a saucy split down the middle, held together by silver loops as she attended the event a day after breaking her pregnancy news to fans. 

The Too Hot to Handle star accessorized with chunky gold earrings and a pair of black heels. She was joined by her fiancé Jesse Sullivan, 34, who sported a sleeveless rocker shirt, black pants and boots. 

The actress announced her first pregnancy on Sunday after a 'bumpy' IVF journey with her transgender fiancé Jesse. The expecting star broke the news across social media on International Transgender Day of Visibility in honor of dad-to-be Jesse, whose reassigned gender was affirmed in 2019.

Country star Lainey Wilson, 31, looked cool as ever in a black feather fringe vest, bell bottom leather pants, and a black cowboy hat. 

Rapper Latto, 25, was a red hot bombshell in a fiery corset-style mini dress with a frilly bottom, that displayed her legs and highlighted her ample cleavage. 

Vanderpump Rules star Katie Maloney, 37, put on a leggy display in a shimmering silver sequin mini dress and silver heels. She accessorized with a matching clutch and dimming necklace.

Her former co-star Rachel Leviss, 29, sizzled up a storm in a bustier-style black gown with a thigh-high slit. Her gown featured a lace-up back, and she teamed the look with black heels. 

Tori Spelling, 50, showed off her trim frame at the event, after recently filing for divorce from estranged husband Dean McDermott.

She put her flat abs on display in a black crop top and a pair of plaid pants. Her platinum blonde tresses were curled for the occasion.

GloRilla, 24, showcased her incredible figure in a teal halter top dress that put her abs on display. 

Host Ludacris, 46, sported a baby blue leather jacket, beige pants and comfortable sneakers for the event. 

Jelly Roll, 39, was joined by his wife Bunnie Xo. The pair showed each other plenty of PDA, sharing a sweet kiss in front of the shutterbugs. 

Jennifer Hudson, 42, was a silver queen in a metallic gown with feathered sleeves. She completed her outfit with matching heels and a number of rings on her fingers.

Rapper Doechii, 25, showed off her unique style in a grey hoodie and matching mini skirt, as well as a pair of fur boots. 

Singer Justine Skye, 28, was the picture of elegance in a deep green hooded mini dress, that was cinched in at the waist with a matching belt. 

Jared Leto, 52, was edgy in a fitted black suit with mesh details, including sheer black gloves. 

Gwen Stefani's ex-husband Gavin Rossdale, 58, rocked an all black outfit with a bright yellow t-shirt underneath. He was joined by girlfriend Xhoana Xheneti, who donned a metallic silver gown. 

Peso Pluma, 24, sported a black leather jacket and pants, as well as black sunglasses, while NSYNC's Lance Bass, 44, showed off his bright pink hair at the event.

T.J. Holmes, 46, was joined by girlfriend Amy Robach, 51, who looked incredible in a mint lace dress. 

Meghan Trainor, 30, channeled Barbie in a pale pink pleated mini dress, with matching platform heels. She was joined by her brother Ryan Trainor, who sported an all-brown look. She also struck a pose with Chris Olsen, who showed off his muscles in a brown tank top.

Tate McRae, 20, put on a busty display in a metallic gold mini dress with a white lace trim.

Justin Timberlake, 43, looked casual cool in a grey blazer, black pants and sneakers. He accessorized his outfit with a pearl necklace. 

Niecy Nash-Betts, 54, was joined by her wife Jessica Betts, 41. Niecy wowed in a classic black and white gown, while Jessica wore a sporty set.

T-Pain, 39, rocked a green and black pattered co-ord, along with green sneakers. 

Pete Wentz and Andy Hurley of Fall Out Boy matched in black. 

Maksim Chmerkovskiy, 44, was effortlessly cool in a light brown suit with pleated pants. Underneath he wore a sheer black shirt that showed off his chiseled torso. 

Acting legend Meryl Streep, 74, skipped the red carpet but was seen speaking onstage inside. The iconic star wowed in a plunging white gown. 

Lola Brooke, 30, was stylish in a denim corse-style gown with a thigh-high slit. 

Backstreet Boys' AJ McLean, 46, opted for a casual yellow hoodie, cargo pants, and unique lace-less sneakers. 

Rapper Flavor Flav, 65, donned his signature chunky clock chain. Other artists attending the event included Kendall Schmidt and Logan Henderson.

Bachelor star Ben Higgins, 35, looked handsome as ever in a black button-up and jeans. 

The achievements of the biggest names in music will once again be recognized at this year's 11th annual iHeartRadio Awards. 

The awards show, held at the Dolby Theatre in downtown Los Angeles on Monday evening, honors the artists and songs who were most played on iHeartRadio stations and the app.

Ludacris will be hosting the celeb-packed affair, and Beyonce and Cher will be receiving awards recognizing their contributions to music. The Queen Bey will be awarded the iHeartRadio Innovator Award while Cher will receive the Icon Award.

On top of seeing their favorite artists win awards, viewers will also be treated to an array of performances by the likes of Justin Timberlake, Tate McRae, Green Day, Jelly Roll, and TLC. 

The ceremony can be watched on FOX and heard via various iHeartRadio stations and on the iHeartRadio app. 

Speaking with People about the awards show, Ludacris raved:  'When it comes to iHeart, it's all about energy. It's all about [viewers] seeing their favorite artists. It's about blowing the roof off of this venue, man,' he said. 'I think that it's just going to be fun because you have a great variety of people in here as well, so it should be good. And it's right after Easter, so come on, man.'

He explained he was looking forward to the 'variety' the show had to offer.

'I love that you got Jelly Roll on here, you got Lainey Wilson, you got Justin Timberlake. I'm not only hosting, but humbly speaking, I'm also performing. I just want to be a part of greatness. It's so much talent, so much energy and so much stuff to look forward to — and some surprises as well.'

Nominations for the ceremony were announced back in January, with Taylor Swift, Jelly Roll, 21 Savage, SZA and Olivia Rodrigo leading the nominations.

Artists receiving multiple nominations include, 21 Savage, Beyoncé, Billie Eilish, Blink-182, Carin León, David Kushner, Doechii, Doja Cat, Drake, Dua Lipa, Fall Out Boy, Foo Fighters, Grupo Frontera, Ice Spice, Jelly Roll.

Nominations for the ceremony were announced back in January, with Taylor Swift, Jelly Roll, 21 Savage, SZA and Olivia Rodrigo leading the nominations.

Also on the list is Jung Kook, Karol G, Lil Durk, Luke Combs, Megan Moroney, Metro Boomin, Miley Cyrus, Morgan Wallen, Noah Kahan, Olivia Rodrigo, Paramore, Peso Pluma, Rema, Selena Gomez, Shakira, SZA.

The Weeknd, Tyla, Usher and Yng Lvcas round out the list.

Song of the Year went to: 'Calm Down' - Rema and Selena Gomez; 'Creepin'' - Metro Boomin with The Weeknd and 21 Savage; 'Cruel Summer' - Taylor Swift; 'Dance The Night' - Dua Lipa; 'Fast Car' - Luke Combs; 'Flowers'- Miley Cyrus; 'Kill Bill' - SZA; 'Last Night'- Morgan Wallen; 'Paint The Town Red' - Doja Cat; and 'vampire' - Olivia Rodrigo.

Tom Poleman, Chief Programming Officer for iHeartMedia, said at the time: 'Our iHeartRadio Music Awards are special because they're truly reflective of what listeners love. 

'We're excited to share the journey on how they became the biggest songs and celebrate these amazing artists with music fans across the nation together LIVE from Los Angeles.'

Fans will also be given the chance to decide winners in a number of new and established categories including Best Lyrics, Best Music Video, and more. 

The ceremony will also provide a sneak peek of 2024's upcoming hits, along with surprise guests, collaborations, and the stories of the artists who reached number one. 

Since the iHeartRadio Music Awards' inception in 2013, the show has included live performances and appearances by superstar artists such as Alicia Keys, Ariana Grande, Blake Shelton, and many others.

'The iHeartRadio Music Awards is a night where we celebrate the biggest artists and songs fans loved listening to on the radio all year long,' said John Sykes, President of Entertainment Enterprises for iHeartMedia.

'We'll also share stories from the artists themselves about their hard-fought journeys to the top of the charts.'

Social voting began January 18, and closed on March 25 at 11:59 p.m. PT for all categories.