Nick Jonas Spends 21st Birthday In Vegas Clubs

Nick Jonas is officially 21 now, and the Jonas Brothers star didn’t wait one minute past his official legal to drink time to get down to partying in Vegas.

Along with Nick Jonas, girlfriend Olivia Culpo and entourage were on hand to celebrate the big day in several hot Vegas spots, and according to E!, a countdown to 21 preceded the celebration.

The entertainment news network says Jonas and pals clapped as Nick hit the big milestone, reporting:

“At exactly midnight, Nick was watching his iPhone’s date change over to officially ring in his birthday… The group erupted in applause as a birthday cake was presented by the staff… The brothers sang ‘Happy Birthday’ and Culpo snapped pictures of her man on her phone for social media. The couple cozied up for a cheers with a celebratory glass of champagne followed by a sweet kiss.”

For dinner, the Jonas Brothers and their female companions, including Jonas mom-to-be Danielle Jonas, hit Encore Las Vegas’ Andrea’s for a meal consisting of crispy tuna, the special cucumber roll, spicy tuna shrimp tempura, lettuce cups, New York Strip steak, black cod, Jidori chicken and smoked salmon rolls.

Then it was over to club XS, where Nick Jonas was presented with a Vegas themed birthday cake by waitresses as he partied with the fam. When not tearing up the town for Jonas’ 21st birthday, the group hung back at the popular Wynn Las Vegas, and the brothers also played golf.