Meester surprises fans at NYC concert

Cobra Starship frontman Gabe Saporta has praised Gossip Girl star Leighton Meester after she joined them on stage at a recent concert.

The actress, who plays Blair Waldorf in the CW drama, surprised the audience at New York's Nokia Theater when she joined the band for a performance of their collaboration 'Good Girls Go Bad'.

Speaking to OK, he said: "It was a monumental show for us.

"Since that song has been recorded it went top-five, sold a million copies... We've never performed it together. Never ever ever. Today was the first time we did that.

"The girl can really sing. She's really f**king cool. And the thing is, we're kinda like bad boy rock dudes and she's a real-life celebrity, and like I don't give a f**k."

Saporta added: "Sometimes those two worlds clash together and they don't mesh well. But with her it meshed perfectly. Like she was still very refined and very cool, but she has a sense of humour and jokes around with us and has a great time."

Meester appeared on MTV's It's On With Alexa Chung earlier in the day to perform new single 'Somebody To Love'.