Dermot O'Leary returns with the second of this weekend's shows. Tension will be in the air when the results of the public vote are announced. Following their exciting live performances last night, the acts have had to wait almost 24 hours to learn their fate. The performers with the lowest number of votes will have to sing for survival, leading to at least one devastating elimination. Tonight's guest star performances come from US rockers fun. and Robbie Williams