But what are they singing?
Simon Cowell’s over 25s
Ben Haenow: Whitney Houston – I Will Always Love You
Fleur East: Whitney Houston – I’m Every Woman
Stevi Ritchie: Elton John – Still Standing
Cheryl Fernandez-Verisni’s girls
Lauren Platt: Whitney Houston – How Will I Know?
Ben will take on Whitney's I Will Always Love You
Mel B’s boys
Andrea Faustini: Whitney Houston – I Have Nothing
Louis Walsh’s groups
Only The Young: Elton John – Something About The Way You Look Tonight
Stereo Kicks: Elton John – Don’t Let The Sun Go Down On Me.
Are you looking forward to seeing the hopefuls tackle the classics? Who’s your favourite to win? Comment below and let us know!