Party people at Vegas' Bank Nightclub in the Bellagio Resort & Casino got a special treat Friday night!
Bruno Mars rocked the crowd at the packed nightclub performing his big hits like Grenade and The Lazy Song.
Insiders tell us the crowed was having a great time, singing along and waving their lighters from side to side.
After his performance, he was humble enough to take photos with his fans. He even stayed to socialize with the fellow partiers, including Glee stars Naya Rivera and Darren Criss!!!
Later, he was shocked when he got this awesome cake shaped like an old-school microphone (as pictured above).
He stayed with his friends, partying it up, until 3am. Then, he went back up to his VIP suite, and maybe had a little bit of post-party fun??
[Image via Wire Image.]
Tags: bruno mars, cake, darren criss, glee, grenade, naya rivera, party, the lazy song, vegas