Overview:Only seven acts remain and the competition will be getting fiercer than ever as the performers battle it out to stay in the running. Judges Simon Cowell, Cheryl Cole, Dannii Minogue and Louis Walsh will be on the edges of their seats as they support the singers they are mentoring, while host Dermot O'Leary is on hand to deal with all the tears and triumphs. Who will impress the judges - and the voting public - today?