Hopeful artists face the blind auditions, and the four coaches give a group performance.

Holly Willoughby and Reggie Yates return to present the next set of blind auditions.

Sir Tom Jones, will.i.am, Danny O'Donoghue and Jessie J continue to build their teams.

Sir Tom Jones, will.i.am, Danny O'Donoghue and Jessie J continue to build their teams.

Holly Willoughby and Reggie Yates host the penultimate round of blind auditions.

Holly Willoughby and Reggie Yates host the final round of blind auditions.

Holly Willoughby and Reggie Yates host the first of the battle rounds.

Holly Willoughby and Reggie Yates host the next of the battle rounds.

Holly Willoughby and Reggie Yates present as the battle rounds come to their conclusion.

Holly Willoughby and Reggie Yates present the first of the knockout rounds.

Holly Willoughby and Reggie Yates present the second of the knockout rounds.

The artists perform before the nation in a bid to secure a place in the semi-finals.

Holly Willoughby and Reggie Yates present the live results show.

Holly Willoughby and Reggie Yates return to present the live semi-finals.

Total power lies with the viewers as the four finalists face the public vote.