After weeks of auditions and deliberations, the competition truly begins as the 16 remaining acts take to the stage for the first live show. To recap: Gary Barlow has got the boys - Frankie Cocozza, Marcus Collins, Craig Colton and James Michael; Kelly Rowland mentors the girls - Misha Bryan, Janet Devlin, Sophie Habibis and Amelia Lily; and Tulisa Contostavlos is looking after the groups - 2 Shoes, Rhythmix, Nu Vibe and the Risk. But Louis Walsh - the only remaining original judge - will be hoping to show his rivals how it's done with the over-25s - Sami Brookes, Kitty Brucknell, Jonjo Kerr and Johnny Robinson. On this occasion, viewers do not have the chance to vote for their favourites - as the judges provide opinions and defend their own acts - before having to vote one of their own acts off the show. Indeed, four of the shower are being culled this weekend. You can see who tomorrow night. Dermot O'Leary finally gets to host proper.