Charlotte is joined in the studio by actress Billie Piper and singer Gwen Stefani. Music comes from McFly, who duet with Charlotte to perform their version of Primal Scream's classic, Rocks.
Big Brother presenter Davina McCall joins and the music is provided by Lucie Silvas.
Hollywood actress Hilary Duff joins Charlotte in the studio, while music comes from Jamelia.
Canadian rock star Avril Lavigne drops by the studio. Other guests include Lorraine Kelly and Patrick Wolf.
Charlotte is joined in the studio by Doctor Who and Torchwood star John Barrowman, and actor Danny Dyer. The Manic Street Preachers provide the music.
Skins star Nicholas Hoult, glamour model Katie Price and Black Eyed Pea Fergie join Charlotte for the final episode.
