Robin Thicke spent the early part of New Year’s Eve with his new girlfriend, April Love Geary, but she couldn’t ring in 2015 at a Las Vegas club with him because she isn’t yet 21.

A source told The New York Post that Thicke, 37, and Geary had dinner together at Bazaar Meat inside the SLS Hotel, but when it was time to hit Foxtail Nightclub she had to stay behind because she was too young to gain entry.

The crooner, whose wife Paula Patton filed for divorce in October, then headed to the club around 11:30 p.m. with some pals.

At one point in the night, Thicke jumped into the crowd to perform his tune “Blurred Lines” and got mobbed by girls.

He reportedly drank Champagne and partied until the wee hours.

Meanwhile, Thicke spent Christmas Eve with his ex. Patton, 39, invited him to her Christmas Eve party, reports TMZ, so that both parents could be with their son, Julian.