Justin Bieber Partied With Jay Z, Beyonce in New York

Justin Bieber scored big over Super Bowl weekend. The singer, 19, spent three days partying in New York City, culminating with a post-game bash at luxe hotspot GoldBar, where he mingled with none other than Beyonce and Jay Z, a source shares in the new issue of Us Weekly.

"Justin behaved a lot better that night!" the source tells Us of the Canadian pop star, whose recent antics have landed him in trouble with police on more than one occasion over the last few weeks. (Last month, Bieber was arrested in Miami for DUI; he was also allegedly involved in a dispute with a flight crew en route to New Jersey.)

The "Heartbreaker" singer wasn't on his best behavior all weekend, though. At the Leather & Laces party on Feb. 1, "he made security clear a path for him so he could skateboard in the middle of the aisles," a source tells Us. And during Maxim's pre-Super Bowl bash on Jan. 31, he used his bodyguards to hit on women.

Amy Pinard PhotographyJustin Bieber Super Bowl Weekend
Bieber "pointed to girls he liked, and his security would shine flashlights at them so they'd come over," a witness tells Us. Another onlooker says he left with "a gaggle of girls."