Shakira is gearing up to play the Super Bowl Halftime Show in 2020 with Jennifer Lopez, and -- as Stereogum points out -- one of the things she has done in the meantime is cover Green Day's 1994 pop punk smash "Basket Case." Considering she's already covered The xx and Metallica, it's not that weird or surprising or anything, but it's still kind of awesome when worlds collide like this. Will she perform it -- and/or bring out Green Day -- at the Super Bowl? Whatever her reason for rehearsing it is, she sounds pretty good doing it. She sings as her producer plays acoustic guitar, and it's a fairly straightforward take but fun stuff nonetheless. Check it out above.

Update: Billie Joe Armstrong approves: