Pink's marriage to motocross star Carey Hart is in trouble, after less than a year.The couple - who wed on a beach in Costa Rica in January this year - have spent long spells apart because of their work commitments and the distance is said to be putting pressure on their relationship.A source told the National Enquirer magazine: "Pink and Carey's marriage is in trouble."They're both crazy busy with their separate careers, and it's beginning to take a toll on their relationship. "They're hardly ever together."Pink - real name Alecia Moore - has been busy promoting her album 'I'm Not Dead', while Carey, 31, is a hugely successful motocross champion, runs a tattoo parlour in Las Vegas and is looking to open up another body art shop in Cabo San Lucas, Mexico.The 27-year-old singer met her husband at the 2001 X Games in Las Vegas and proposed to him during one of his races by holding up a placard reading 'Will you marry me?'

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