Lewis Hamilton and Nicole Scherzinger have held relationship crisis talks after she was spotted partying with Chris Brown.

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Although the F1/popstar couple are currently on a break and both Scherzinger and Brown have insisted they are just friends, Hamilton flew to Los Angeles to demand an explanation.

“When he saw the pictures of her with Chris, he flew off the handle,” a source told The Sun.

“He wasn’t happy at all – even though they were not together any more. Lewis wanted to hear [Nicole’s explanation] for himself.”

“Splitting was his decision. He’s got a lot on his plate at the moment. And her commitments on X Factor and his career were clashing over the last few months.

Brown and the X Factor judge were spotted looking intimate and appeared to be locking lips at exclusive Los Angeles night spot Supperclub last month, but the pair insisted they were simply talking.

A spokesperson for Brown commented: “No story here. They were not kissing. They are friends and have been for years. They were talking at a club that was playing loud music.”

Scherzinger’s representative added: “I guarantee there will be no photos of them kissing.”