Justin Timberlake's eyes spark concern in newly-emerged video days after star's DWI arrest

Justin Timberlake's red-eyed appearance at a Las Vegas concert has sparked concern in the wake of the star's  recent DWI arrest.

Timberlake's eyes looked sore and tired - but his expression seemed startlingly alert - during a concert in Vegas last month.

Footage of his appearance has re-emerged in the wake of Tuesday's arrest, which saw the 43 year-old singer pulled over in his BMW X7 as he left The American Hotel in the Hamptons town of Sag Harbor.  

Days later, Poo Crave, a fake, satirical X account modeled after the popular online media source known as Pop Crave, falsely posted that Timberlake 'had traces' of molly, or ecstasy, in his system. 

The same profile claimed he was found to have poppers, which are chemicals people inhale to get high, Truvada, a prescription medication used to treat and prevent HIV, and cocaine in his 'bloodstream' following the DWI. 

Footage shows Timberlake singing and interacting with cheering fans during his The Forget Tomorrow World Tour concert in Sin City. 

But what might seem like a fun celebrity moment has instead left fans distressed as eagle-eyed viewers were quick to notice the singer's bleary eyes. 

Attendees standing close to the barriers were evidently shocked and taken back when they noticed his dreary looking red eyes. 

As the video went viral, spectators jumped to the comment section to express concern about the musician's state. 

One X user quipped: 'Jesus somebody give the mans some sunglasses.'

While another questioned: 'What's wrong with his eyes?' 

One user also came to Timberlake's defense and said: 'Y'all be judging ppl and don't know what it takes to be them. Entertaining thousands of ppl for nights on end can't be easy.' 

Some also 'quoted' Timberlake and wrote: 'this is going to ruin the world tour'.

One user further wondered: 'Did he blink?' 

Law enforcement sources said that the Sexy Back crooner was pulled over shortly after midnight on Tuesday.

Police reportedly saw him blow past a stop sign and observed him swerving across the road.

The father-of-two failed a field sobriety test, and he was handcuffed and arrested, a police report said. At the station, he refused to take a breathalyzer test.

On Tuesday morning, Justin was seen being led across the bridge from Sag Harbor police headquarters to the village's Justice Court by police officers in exclusive pictures obtained by DailyMail.com. 

The musician appeared shell-shocked as he looked straight ahead and had handcuffs on. After a brief arraignment where he was banned from driving for a year in New York, he was released without bail, emerging from court wearing a baseball cap. 

He was arraigned on one count of DWI, as well as running a stop sign and failing to stay in his lane. 

He is next in court on July 26. There have not been any real reports of drugs being in his system.

Justin has admitted to using illicit substances numerous times over the years.