Nickelback has taken to social media to post tell the world of the performance tonight with Avril Lavigne joining them on stage to perform “Rockstar.” Telling their fans “When we say “you never know who will join us for ‘Rockstar’ karaoke”… we mean it. Thank you @avrillavigne and Los Angeles for an amazing night!” This is the first time Avril Lavigne has been on stage performing in about 3 years.

Lavigne was at the Nickelback concert at the Greek Theatre in L.A. when she grabbed a mic and got on stage to perform “Rockstar” with her ex-husband and Nickelback frontman Chad Kroeger.