By Dave Karger
May 20, 2009 at 08:39 PM EDT

Extra‘s Terri Seymour — the ex-girlfriend of Simon Cowell — was assaulted outside the Nokia Theater in Los Angeles after last night’s American Idol finale performance, the LAPD confirms to EW. According to police, a 33-year-old woman named Janice Thibodeaux approached the British beauty and asked if she was Simon Cowell’s ex. When Seymour said yes, Thibodeaux allegedly began choking her. Police officers apprehended Thibodeaux and booked her on felony battery charges.

“It was all so sudden….Very scary,” Seymour, who declined medical treatment on the scene, told Extra the following day. “Nothing like this has ever happened to me before.”

Although Seymour and Cowell are no longer dating, she still interviews him often on Extra and they have remained good friends.