The pair teamed up to sing Alanis' song "You Oughta Know" at the 2015 American Music Awards.
"You Oughta Know" was the lead single off of Morisette's album Jagged Little Pill, which just turned 20.
Watch their performance below.
Catch some other awesome moments from the 2015 America Music Awards in the gallery below!
More on Billboard.com:
Billboard cover: Missy Elliott on her comeback -- 'There is only one Missy'
Latin Grammys: 12 things you didn't see on TV
Gwen Stefani on 'The Ellen DeGeneres Show' and more photos of November 2015