The 48-year-old music mogul is believed to have walked out on Terri, 34, following a blazing row over Terri's insecurities, and he has now ended their six-year relationship.

A friend of Simon's told Britain's Star magazine: "He told me he is tired of Terri's insecurities. They lead separate lives, and that's how he likes it, but lately she has turned up unannounced at events he is at."

Simon Cowell has bought a $5 million mansion for his ex-girlfriend Terri Seymour.

Cowell, who recently split from the 33-year-old TV presenter after five years together, has reportedly splashed out on a property for her in Hollywood, California.