High Quality Content by WIKIPEDIA articles! "I Hate This Part" is a song by American girl group the Pussycat Dolls from their second album, Doll Domination. Written by Wayne Hector, Lucas Secon, Jonas Jeberg and Cutfather it was released as the album`s second single on October 7, 2008. The song is about someone who knows a relationship is over, and needs to end it – which is the hardest part – and the part they hate.