Video: Avril Lavigne What The Hell and Push - Jimmy Kimmel Live - Mar 15

We love when Avril Lavigne strips things down (ahem— musically ). And so after her energetic Tonight Show performance of "What The Hell" on Monday, we were jazzed to watch her serve up an acoustic rendition of the hit single last night on Jimmy Kimmel Live . Way later in the show the tattooed Canadian belted out her Goodbye Lullaby track "Push" as the programs end credits began to roll. Watch both performances below.