London: Coldplay frontman Chris Martin says he is scared to collaborate with teen sensation Justin Bieber.

The 35-year-old singer, who has collaborated with various artistes in his decade long career, said Bieber will make him look wrinkly, reported Sun online.

"Justin Bieber is too handsome for us. If he wants to do a video with four people who look like his grandparents then we should be in it. But we've got to look good — we'd just look terrible next to that guy. He's good-looking and has an amazing complexion," Martin said.

Martin, who is married to actress Gwyneth Paltrow, has recently collaborated with R&B star Rihanna.

"Rihanna was top of our list of collaborators, and we've done that. She was lovely — she was cool. We had worked with anyone who wanted to work with us."

(Agencies)

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