X Factor 2015: Watch 4th Power wow judge Simon Cowell in first audition rounds -

Simon Cowell couldn't have asked for a better act for the first X Factor Saturday of 2015 than girl band 4th Power.

The quiet girls from the Philippines huddle nervously on the stage at Wembley in front of Cowell, Cheryl Fernandez-Versini and new judges Rita Ora and Nick Grimshaw.

Then the music kicks in, and everything changes. Fierce choreography and wild vocals make the judges do so much more than sit up and take notice: Cheryl hardly stops shimmying to their version of Jessie J, Ariana Grande and Nicki Minaj's Bang Bang.

Watch the video of their performance below, and follow all the opening X Factor auditions from 8pm on ITV.

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