The girl group - who were led to victory by the X Factor judge last year - started performing the track while at a styling session in their latest video episode of The Little Mix Diaries.
The four-piece begin to sing, but quickly forget the lyrics. They then regain their place in the song and start to jump around while performing.
Little Mix are currently preparing to release their first proper single and recently finished filming the accompanying music video.
The group teased that the visual will contain choreography from them, with a picture showing the quartet straddling chairs while in rehearsals.
Little Mix will support JLS on their 'Sound City Summer Tour' later this year and will perform at T4 On The Beach on July 1.
Watch Digital Spy's recent interview with Little Mix about their debut single below: