Avril Lavigne Talks Billy Idol Collab, Performs with the Icon for Her 40th Birthday

Avril Lavigne celebrated her 40th birthday early with Billy Idol!

On Thursday, Sept. 25, the Canadian pop-punk singer made a surprise appearance at the “White Wedding” hitmaker’s show at the Kia Forum in Los Angeles.

After teaming up for the track “77,” which was featured on Idol’s latest album Dream Into It, Lavigne, 39, joined the “Sweet Sixteen” artist, 69, to perform a thrilling rendition of the track.

In video footage shared on Instagram by the venue, Idol can be seen sporting an entirely black ensemble featuring a leather vest with chains while passionately singing in tandem with Lavigne, who appears in a black, shearling maxi coat, an oversized T-shirt, black tights and boots.

In an exclusive interview with PEOPLE, the “Girlfriend” performer reflected on working with “Hot in the City” artist and called him a “true legend.” She also noted she has a collaboration with Bon Jovi on their forthcoming record Forever (Legendary Edition) due Oct. 24.

“It’s incredible to collaborate with legends across the rock genre. As I continue to work on what’s next, I definitely look forward to branching out with different people,” says Lavigne.

According to a press release, in honor of her upcoming birthday, Idol also surprised Lavigne with a cake backstage.

Per the release, the “Complicated” musician also met Joan Jett for the first time at the show, as Joan Jett & The Blackhearts have been opening for Idol throughout his North American tour.

Lavigne previously covered her 1980 classic “Bad Reputation” on The Best Damn Tour and then recorded it as a bonus track for her 2011 album Goodbye Lullaby.

Earlier this month, Lavigne exclusively announced her first official wine, “Banshee Complicated” with Banshee Wines, with PEOPLE.

The $30 limited-edition, small-batch pinot noir — named after her 2002 breakout single “Complicated” — is light and layered with bright notes of cherry and raspberry.

According to Lavigne, a two-year collaboration with Banshee, beginning with her Greatest Hits Tour, led to this moment since “the Banshee bar became a staple backstage and at my afterparties.”

“Our partnership is so natural, and as my love for wine has grown over the years, I knew they were the brand I wanted to collaborate with to launch my first official wine,” she told PEOPLE.