The X Factor

New hosts Olly Murs and Caroline Flack kick off the twelfth season of X Factor; musician Rita Ora and radio host Nick Grimshaw join veteran judges Simon Cowell and Cheryl Fernandez-Versini in hopes of finding the next pop sensation.

"X Factor" returns with new hosts, Olly Murs and Caroline Flack.

The search for new talent continues.

The judges continue to search for new talent.

The search for the next pop sensation continues.

The search for the next pop sensation continues.

It's the last night of arena auditions before performers hope to secure a place at boot camp.

Boot camp begins.

Drama unfolds at boot camp as the remaining hopefuls perform for the judges in a country house setting.

The judges decide on the final six acts for each category; no one is safe until everyone has sung.

The Six Chair Challenge continues as contestants hope to make it the Judges Houses round and the judges agonize.

Tonight's episode sees the dramatic Six Chair Challenge conclude.

The final 24 hopefuls appear in the "X Factor" studio in London to discover if they've made it past the final hurdle with the judges to secure a spot in the live show.

The final 24 contestants will be in the X Factor studio in London.

The competition moves into its live phase as each of the final 12 contestants takes to the stage and performs live for the first time; Olly Murs and Caroline Flack host; judges Nick Grimshaw, Rita Ora, Cheryl Fernandez-Versini and Simon Cowell.

Tonight sees the first elimination as hosts Olly Murs and Caroline Flack tell the remaining acts who is safe and who must leave the competition.

The nation's favorite singing competition has its second live show, as each of the remaining contestants takes to the stage once again; Olly Murs and Caroline Flack host; Nick Grimshaw, Rita Ora, Cheryl Fernandez-Versini and Simon Cowell are judges.

Caroline Flack and Olly Murs host as the singing competition's next elimination is announced; the remaining acts will learn their fate; a star guest performance is featured.

The nation's favorite singing competition continues with the third live show of the series, as the remaining acts take to the stage to perform once again.

Caroline Flack and Olly Murs host as the singing competition's latest elimination is announced.

Each contestant will perform a song about the pain and heartache of being in love.

After a sensational set of performances for last night, tonight sees another elimination.

The singing competition reaches the quarter-final stage, as the remaining acts take to the stage.

Caroline Flack and Olly Murs host as the singing competition's latest elimination is announced.

The singing competition reaches the semi-final stage, as the remaining acts take to the stage to perform once again.

Caroline Flack and Olly Murs host as the singing competition's latest elimination is announced; the tension will become almost unbearable for the remaining acts as they learn their fate.

This year's competition enters its final stage as each of the final three contestants perform.

This year's competition comes to a close with the results from the live final; the two remaining contestants battle it out in front of an audience of thousands at the SSE Arena in Wembley for the chance of being crowned the winner of X Factor 2015.

A look at the life-changing journey of this year's X Factor winner, from their initial auditions and live show performances right through to the nail-biting final and beyond. How is the 2015 champion coping with life in the spotlight, and what awaits them in the coming months? Featuring interview...