This episode's theme was Disco. The contestants all performed massive disco hits from the 70's, 80's and 90's. Once again, the voting increased this week setting a new Pop Idol record. There was just 7% between the bottom four contestants.... Performances Mark R: More Than A Woman (Originally Performed by the Bee Gee's) Susanne: Young Hearts Run Free (Originally Performed by Candi Staton) Andy: Rock With You (Originally Performed by Michael Jackson) Sam: Blame It On The Boogie (Originally Performed by Jackson 5) Michelle: If I Can't Have You (Originally Performed by Yvonne Elliman) Roxanne: Can You Feel It? (Originally Performed by Jackson 5) Chris: Ain't Nobody (Originally Performed by Chaka Khan) Later, Ant and Dec return to host the LIVE results programme. Kelly Clarkson is a special guest star, and she performs her new single ""The Trouble With Love Is..."". Foxy comments ""After hearing Kelly up there, I think this lot are going to have to raise thier game next week!"".