Look at this picture, it's ridiculous. Photographic evidence that Simon Cowell has been cheating on his girlfriend, Terri Seymour, with a 21 year old model no less. Here is Jasmine Lennard leaving his flat. But The Mirror got the story, and now Terri confronted Simon. From In Touch:

"Acid-tongued America Idol judge Simon Cowell got a taste of his own medicine when he was reunited with his girlfriend, Terri Seymour, in London following revelations he had a tryst with model Jasmine Lennard. According to reports, the 46-year-old TV star has been having a six-month affair with 21-year-old Jasmine.
Upset over the news, his girlfriend of four years, Terri, 32, immediately flew from LA to London to confront Simon, who picked her up in his Phantom Rolls Royce.
"Terri is irate at the whole situation," a pal of Simon's reveals. A stony-faced Terri, who is a correspondent for Extra!, arrived at Terminal 4 at Heathrow Airport on July 27 and met Simon in the airport's Starbucks. A friend of Simon's tells In Touch, "It's unusual for Simon to pick her up personally from the airport - he usually goes everywhere by chauffeur but decided this time he needed to."
"They didn't kiss each other when Terri arrived and she was very stand-offish," the pal continues. "They were arguing in the coffee shop and Terri looked close to tears."
The couple then headed to Simon's West London home to talk further."