Live Show 7: Wham! Week

There are only six acts remaining in the competition, and today they must sing live again in a battle to win the biggest prize in pop. Also fighting it out are judges Simon Cowell, Cheryl Cole, Dannii Minogue and Louis Walsh, who are each mentoring one category of singers. Host Dermot O'Leary will be on hand to deal with all the tears and triumphs.