As if The X Factor (7.30pm) and a new series of All Star Family Fortunes (8.30pm) wasn't enough cheese for ITV viewers of a Saturday; they're getting the grater our for this one-off dance extravaganza, of sorts. Fearne Cotton hosts this affectionate look at dance crazes that have swept the country at various times. Mica Paris, Whigfield, Jimmy Osmond, Jocelyn Brown, Signature from Britain's Got Talent and the cast of Grease are among the stars showing how it was done, while celebrities reminisce about their efforts to master the moves for Night Fever, the Time Warp, the Locomotion, YMCA, Tragedy and Thriller. Along with the performers of each dance tune, scores of on-stage dancers will be showing viewers at home how it's done as they strut their stuff in the studio to each and every routine. The show will also feature nostalgic pop videos, alongside viewers' very own 'hilarious home video dance montages'. This is then followed by Shakespeare in Love at 10.15pm... *sighs*