Jessica Simpson's brave face

Jun 14, 2007, 13:00 GMT

05/18/2007 - Jessica Simpson - snoresville © Solarpix / Photorazzi

Jessica Simpson is "really happy" since splitting from John Mayer, her friends have claimed.

Jessica celebrated her newly single status with a girls-only night in Los Angeles last week - and reportedly told pals she was "happy" about her recent break-up.

A source told Us Weekly magazine: "She was telling friends, 'We were so different, we were fighting so much. I'm really happy to be out of that relationship. This time, it's totally done.'"

Another source close to the 'Employee of the Month' star added, "Jessica is definitely single".

Jessica, 26, and 29-year-old musician John dated for nine months before splitting last month.

Their relationship had reportedly been rocky for weeks and finally ended after they were seen "rowing badly" while on holiday in Mexico.

Earlier this week, Jessica shunned John's concerts at the Hollywood Bowl in favour of partying with friends at Sunset Marquis and Chateau Marmont.

Jessica attended Maroon 5's Los Angeles concert on June 2, but was reportedly ignored by frontman Adam Levine who she was previously romantically linked to.

A source said: "He kept looking at and singing to his new girlfriend. Nobody paid attention to Jessica. It was sad."

Jessica was previously married to Nick Lachey.

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