Simon Cowell Celebrates Birthday in Beverly Hills

Simon Cowell Celebrates Birthday in Beverly Hills

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Simon Cowellcelebrated his 56th birthday withRyan Seacrest, his GF ... and a 'Real Housewife.'

We're told Cowell's baby mama Lauren Silvermanset up everything for the celebration dinner at Sur Lounge in West Hollywood ... where celeb guests included Ryan, designer Rachel Roy, andLisa Vanderpump. Makes sense, since it's her restaurant -- plus, we're told LV and Silverman are longtime pals.

Seacrest surprised Cowell with a mini Maybach. The ex "American Idol" co-stars have a running joke about Cowell's 5'9" height ... which is funny, coming from Seacrest.

Based on Simon's reaction, size doesn't matter to him. Not on his birthday at least.

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Simon Cowell Celebrates Birthday in Beverly Hills

Simon Cowell Celebrates Birthday in Beverly Hills


Simon Cowell Celebrates Birthday in Beverly Hills

Simon Cowell Celebrates Birthday in Beverly Hills

Simon Cowell Celebrates Birthday in Beverly Hills

Simon Cowell Celebrates Birthday in Beverly Hills