Hey, hey, Nickelback found a pop star ready to lend a hand during their performance of "Rockstar" in Los Angeles Friday night (Sept. 8). Avril Lavigne was one of two guests the band had help them out during the song, with guitarist Ryan Peake also pulling a fan named Owen out of the crowd as well.

"You never know who will join us for Rockstar karaoke," the band tweeted about the performance. "Tonight we got super lucky with these two rockstars. It just might be you next!" See the tweet below with Lavigne and Owen posing for a photo.

For Lavigne, it was the singer's first appearance onstage in three years. You can see fan-shot footage of the performance, which took place at the Greek Theater, in the video above.

Lavigne was married to Nickelback's Chad Kroeger between 2013 and 2015, but the couple remained on good terms after their split. They sparked their romance while Kroeger had helped out writing for Lavigne's album.

Nickelback are currently promoting the Feed the Machine album, which was released earlier this summer. It debuted at No. 5 on the Billboard 200 album chart.

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