Rod Stewart, Katy Perry and Lady Gaga were just some of the famous faces who performed at FireAid on Thursday, a benefit concert raising money for those affected by the devastating Los Angeles wildfires.

Lady Gaga closed the FireAid concert in Los Angeles with a live performance of her hit "Shallow" and a brand new song written for the occasion.

The members of No Doubt -- Gwen Stefani, Tom Dumont, Tony Kanal and Adrian Young -- reunited at FireAid Thursday night and sang some of their biggest hits, including "Just a Girl," "Spiderwebs" and "Don't Speak."