Watch Avril's great take on a Kesha classic. The energy and vibe is there like the original - with Lavigne's own spin on the song. Her band is so tight.

'Tik Tok' is Kesha's first ever single off her first ever album, Animal. She co-wrote the song with Dr Luke and Benny Blanco. Kesha later had a falling out with Dr Luke.

Ralph Orlowski/Getty Images
Ralph Orlowski/Getty Images
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In 2010, 'Tik Tok' was the biggest selling single in the world - cashing in with over 12.8 million sold. Avril's 'Tik Tok' cover was recorded at BBC 1 Radio.

Avril Lavigne got her start young. Her debut album, Let Go had the international hit, 'Complicated' - capturing the #1 spot on the US charts for 16 straight weeks.

Lavigne has been married twice to rockers - Sum 41's Deryck Whibley and Chad Kroger from Nickelback. In 2014, Avril revealed she had Lyme disease and was battling fatigue and poor health. She is recovering after help.

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