"Womanizer" is a song by American singer Britney Spears from her sixth studio album, Circus (2008). It was released on September 26, 2008, by Jive Records as the lead single of the album.
Produced and written by The Outsyders, the song was re-recorded after a snippet was leaked onto the internet. "Womanizer" is an up-tempo electropop and dance-pop song.
Described by Spears as a girl anthem, the song's lyrics recall a womanizing man, while the protagonist of the song makes clear she knows who he really is.