Weeks of lively auditions, gruelling boot camps and tense on-stage showdowns draw to a close with the first instalment of the talent show's grand final. Before the winner is announced, remaining acts Grace Davies, Kevin Davy White and Rak-Su face another stand-off, as judges Simon Cowell, Louis Walsh, Nicole Scherzinger and Sharon Osbourne deliver their verdict on each act's performance. As ever though, the judges' decisions are not the only thing that will determine who emerges as this year' champion, with the public vote carrying more weight than ever throughout this year's contest. The act with the lowest public-vote figures faces the heart-wrenching prospect of bowing out in third place, while the remaining two go on to battle it out in the second stage of the final. Plus, a selection of guest stars also take to the stage to help send this year's contest off with style.