Video: Avril Lavigne Covers Ke$ha's 'Tik Tok' Ke$ha may be music's latest devil-may-care party girl, but before she brought her whiskey-fueled brands of oral hygiene and music to the masses, Avril Lavigne was the angsty good-time girl to watch.

Likely noting their similarities, including penchants for teasing men, heavy eyeliner and half-shirts, the 'What the Hell' singer covered Ke$ha's party anthem 'Tik Tok' at the Radio 1 Live Lounge.

Lavigne, whose most recent album, 'Goodbye Lullabye,' was four years in the making, is excited to bring some of her new material (and a few borrowed tunes) to audiences soon.

She told PopEater, "I'm anxious to get out there again ... I work hard, and I also play hard."

Check out Avril's cover of 'Tik Tok' after the jump.