Final 12 become 11 on The X Factor tonight

The X Factor judges take to the stage on last night's show.
The X Factor judges take to the stage on last night's show. Photo: ITV/The X Factor

The X Factor's final 12 will become 11 as the first act leaves the competition on tonight's results show.

The programme turned back time last night with a '80s extravaganza, with the 12 acts - the girls, the boys, the groups and the over-25s - all taking to the stage for the first of the live shows.

In a new twist, 34-year-old mother Shelley Smith became the first victim of the "flash vote" and will sing for survival against a yet-to-be-determined foe.

Shelley, who sang Heart's power ballad Alone for 80s week, wrote on Twitter this morning:

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Morning everyone,I've had a couple of hours kip,a good cry now im coming out fighting tonight! Thank you everyone for yr lovely messagesXXX

Her mentor, Sharon Osbourne wrote after the first live show last night:

Shelley will sing against the competitor with the fewest audience votes by the time lines close on tonight's show.

It is then up to the judges to decide who will be going home.

But before that is revealed, Cher bring some '80s glamour to the stage:

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Will you be watching Cher perform on @thexfactor tonight? Tweet along with #CherFactor and ‘Cher’ the love!

On last night's show judge Gary Barlow revealed this series of The X Factor will be his last

For more news and backstage gossip, visit The X Factor's website

Watch: The X Factor Results tonight at 8pm on ITV