Pink 'celebrated' her marriage split with a raucous night out in Hollywood on Monday. The "Trouble" singer, who recently announced she had separated from her husband of two years Carey Hart, was spotted partying with longtime collaborator Butch Walker at one of her favorite Los Angeles haunts, the Key Club.

And Pink was not in the mood to mourn her marriage - she got the party started when she jumped onstage to join rockers Metal Skool, who perform at the venue every Monday night.

It isn't the first time Pink has joined the group onstage - she teamed up with the tribute act onstage in 2006.

One fans tells In Touch magazine, "She sang laying on the floor because she seemed too drunk to stand."

And it seems Walker is not only her producer and songwriting partner - he's her new man.

Key Club regulars spotted the pair "making out" and "looking very together", according to In Touch.

-Pink Pictures

(This news article provided by World Entertainment News Network)