Joe Jonas celebrated his 21st birthday on stage - complete with a serenade from the audience.
The Jonas Brothers heartthrob was performing a gig in the US with his siblings Kevin and Nick when they suddenly announced it was his birthday and had a tasty-looking cake brought out on stage, reports MTV.com.
Kevin said: "I think it's important that we celebrate with our friends as well."
Nick then turned to the crowd and asked: "Why don't we sing happy birthday to Joe?"
After the rendition of Happy Birthday, Joe tasted his cake and said: "That's really good. Thank you, guys!"