Wild Child Justin Bieber Parties All Night In NYC

Justin Bieber is currently under investigation for reckless driving in his Calabasas, Calif. neighborhood, but he's not slowing down any time soon!

After supporting his BFF Jaden Smith at the After Earth premiere in New York City on Wednesday night, the pop star partied at three different clubs, finally heading home to his hotel after 5 a.m. -- and RadarOnline.com has all the details.

Justin -- clad in a black tank top -- started off the night with his posse at Avenue nightclub, the same spot where Lindsay Lohan was accused of attacking a fellow partier.

The 19-year-old then rolled up at Marquee nightclub just down the street, where he grabbed a table that had been abandoned by another partier's group and checked out DJ Martin Solveig.

Finally, Justin rounded out the night with four male friends at 1Oak. Arriving around 3 a.m., he stayed until past 4 a.m. -- and 1Oak, like Avenue and Marquee, is a 21+ nightclub.

Justin was spotted returning to his hotel around 5:30 a.m. and an eyewitness tells RadarOnline.com, "He left about an hour later for his flight out of Teterboro Airport (in New Jersey). He looked pretty miserable!"

Indeed, it's been a rough week for the singer. His neighbor Keyshawn Johnson accused him of being hell on wheels in their quiet gated community, but sources close to the investigation told RadarOnline.com that the driver who almost ran down Johnson's kids was actually Bieber's pal, rapper Tyler, The Creator.

Late nights of partying is nothing new for Justin, who has developed a reputation in recent months for out-of-control partying.