Simon Cowell returns to his hotel after filming his first day of 'Britain's Got Talent', Manchester, England - 13.01.09

The American Idol judge, who is said to be worth $188 million (£130 million), paid $11.9 million (£8.2 million) for the Los Angeles property two years ago (07).

Since then he has spent millions on renovating the two-storey property - even installing a solarium adjacent to the master bedroom with a full-length tanning machine and a smaller facial tanner.

And Cowell, 49, has also allocated one room in his Beverly Hills mansion to his ex-girlfriend, Terri Seymour, who he split from in November (08).

A source tells Britain's Mail on Sunday, "Simon has the master suite but Terri still has her own room and walk-in closet. She says she plans to stay over, even though she has her own place less than five minutes away. They are still really good friends."

Source: WENN