Chris Martin admits he has a habit of saying "a lot of stupid stuff" that comes back to "bite" him.

The Coldplay frontman has made many comments that he later wanted to retract such as claiming he plans to retire when he is 40.

Chris, who celebrated his 35th birthday on March 2, insists he no longer wants to prematurely end his music career.

"I think that one thing I've learnt over the years is that I say a lot of stupid stuff that comes back to bite me and that's just another one of those things," he said on Australian radio's The Kyle and Jackie O Show.

"I get asked so many questions that it's only human nature that a lot of the answers are just going to be a load of c**p."

Chris added that he is unsure of what he would like to do in five years time. He prefers to live in the moment and take each day as it comes.

"Who knows, I don't know how I'll feel in five years," he said. "At the moment I feel so grateful and happy to have the job I've been given."

The musician, who has two children with his wife Gwyneth Paltrow, is also grateful that Coldplay's latest album Mylo Xyloto has been such a success. However he doesn't believe US President Barack Obama is one of his fans despite hearing it directly from him.

"I got to meet him in the summer and he said, Oh you're on my iPod', and I thought maybe he says that to all the musicians," he laughed.

"I feel like if I was the president I'd say that to a musician."