Lady GaGa reportedly kicked Adam Lambert out of her birthday party.

The 'Born This Way' hitmaker turned 25 on Monday (28.03.11) and the night before her birthday celebrated with a host of showiz pals in Los Angeles' LA Cita Mexican restaurant.

However, the fun was Disturbed when The Rock singer turned up as a guest of Gaga's support act Scissor Sisters "embarrassingly drunk" and was asked to leave by the 'Born This Way' hitmaker.

Gossip blogger Perez Hilton told radio station Morning Dish: "Adam showed up beyond drunk. Super sloppy embarrassingly drunk."

According to Perez, the 29-year-old musician also punched a hole in the establishment's low ceiling.

Another source told told UsMagazine: "Adam acted like an animal. He kept jumping up on the tables and chairs and screaming. When they brought the cake out he tried to smear it in Gaga's face and put a doll from the cake in her mouth!"

Later in the week Adam acknowledged his own bad behaviour, tweeting: "Was trying for celebratory gesture 4 gaga's B- piata style...instead my fist is all bruised and la cita has a hole in the ceiling. #sloppy. (sic)"