Ashlee Simpson is living the single life again — she broke up with her boyfriend/bandmate Braxton Olita a week ago.

So who is she being linked to now? (You know every celeb has a standby.) The unlucky fella is Fall Out Boy bassist Pete Wentz, who TrAsh was making out with the other night at a club in NYC. For Pete’s part, he had been dating Michelle Trachtenberg. He’s said to have kicked the Buffy to the curb for Jessica’s little sis.

PeteWentz.jpgAshlee and Pete were outted on Saturday night when they were getting hot and heavy at Don Hills in NYC. Apparently in between vomiting sessions, TrAsh was straddling Pete for all the other patrons to see.

Funny — Papa Joe Simpson is said to have freaked out earlier this year when Ashlee wanted move in with Braxton. I wonder what he’s saying now that she’s was playing straddle ball with Mr. Eyeliner Overdoser.