Hollywood child star looks unrecognizable with exposed breasts and ripped six pack on red carpet... can you guess who it is?

She is a former child star who landed a memorable role in How The Grinch Stole Christmas at age six. 

This actress, who is now 31, also had a long-running role on the legendary high school soap opera Gossip Girl.

A multi-hyphenate, she also did modeling, signing to elite agency IMG at age 14.

On top of acting and modeling, she is also a musical artist - she is the lead singer of the rock band The Pretty Reckless. 

Can you guess who this star is? 

It's Taylor Momsen!

Momsen looked worlds away from the role of Jenny Humphrey, the character she played for five years on Gossip Girl, while at KidSuper's Funny Business Comedy Fashion Show in New York on Monday. 

The actress displayed her ripped six pack abs and breasts - which were covered with tape pasties - as she rocked the red carpet. 

She rocked an edgy black jacket with grey streaks and matching trousers for the fashionable event.

The trousers were belted and hung low enough to display a hint of underwear.  

Taylor rocked fashionable platform boots while wearing her blonde hair down in loose, cascading waves. 

She accessorized with several necklaces, including one which plunged down towards her cleavage. 

She posted the racy look to her Instagram, and raved of the event: 'Virgin eyes and dirty looks and a great time with @kidsuper at one of the funnest fashion events I’ve ever been to! Thanks to @dougieplaylist and the whole team for having me! @lovesac @puma @bfa @nyfw makeup.' 

Momsen was just six when she landed the role of Cindy Lou Who in How The Grinch Stole Christmas.

The 2000 film saw her act opposite legendary comic actor Jim Carrey, who played the titular Grinch.

Her resume also includes roles in Spy School, Underdog, and Spy Kids 2: Island of Lost Dreams.

From  2007 to 2012 she played Jenny Humphrey on the series about prep school kids in New York City, Gossip Girl. 

Since 2009, she has been fronting the rock band The Pretty Reckless since 2009.

In an interview with Elle magazine in August 2011, Momsen revealed she had quit acting to focus on her music career.

'I quit Gossip Girl and now tour and am in a band and that's pretty much all I want to do. Hopefully I'll be able to only do that for the rest of my life,' she told the publication. 

Pretty Reckless has released four studio albums, most recently Death by Rock and Roll in 2021. They released a compilation album, Other Worlds, in 2022.