Pop star Ke$ha is turned down by “The Hangover” star Zach Galifianakis.

Actor Zach Galifianakis has offended another female star by ignoring Ke$ha’s requests for a date and then lambasting her music upon meeting the singer.

The Hangover star is gaining a reputation for being outspoken following recent barbs aimed at January Jones, who he dismissed as "rude" and an actress "everybody's going to forget about... in a few years".

Pop star Ke$ha has previously insisted Galifianakis is her ideal man, admitting she has a penchant for fat and bearded boyfriends, but Galifianakis admits he snubbed her attempts to contact him and criticized her music when they finally met during a night out.

He tells Rolling Stone magazine, "I saw that Ke$ha woman the other day. She was sitting by herself, and I walked up to her and said, 'Listen, I got your e-mail. Your music is really bad! I don't know who listens to it, but I imagine it's, like, six year olds - and it's a bad message.'"