Jennifer Aniston was spotted "checking out" a handsome stranger on Saturday. The "Marley and Me" actress, who parted ways with John Mayer last month, showed she was over the musician when a mystery hunk caught her attention at Sir Paul McCartney's concert in New York.

A source said: "She looked really happy. There was a definite glow to her. She couldn't stop smiling."

John Mayer insists his break-up with Jennifer Aniston hasn't influenced his songwriting. The "Gravity" singer is about to start work on his fifth album but has denied he will draw on recent events in his personal life for his new material.

Jennifer Aniston is preparing to become a single mother. The "Marley and Me" actress, who split from musician John Mayer earlier this month, is so desperate to have children she is considering adopting or using donated sperm.

A source said: "In a perfect world, she'd get pregnant naturally. But if 'Mr. Right' doesn't show up, she's willing to adopt or try in vitro fertilization using donated sperm. She is working out how she wants to proceed. But one thing is definite - she wants a baby, and she wants one soon. She is willing to become a single mother."

Jennifer Aniston will never marry again. The 40-year-old actress - who recently split from singer John Mayer after a year-long relationship - reportedly thinks she will never find a man she loves as much as her ex-husband Brad Pitt, who she divorced in 2005.

A source told America's OK! magazine: "Ever since Jennifer and Brad split, she has tried desperately to find another man who would win her heart and be the husband she's always dreamed of. But she now realizes that Brad's shoes are impossible to fill."

Jennifer Aniston dumped John Mayer because he wasn't ready to have children. The "Friends" actress and the "Gravity" singer - who had been dating on and off for around a year - ended their relationship last week, with Jennifer's desire to start a family said to be the catalyst for the split.

A source told OK! magazine: "She was truly ready to move on. John wasn't ready to father her child so she ended it."