Love triangles are rarely kept a secret in Hollywood, but there are a few that flew way under the public's radar. In fact, there's a good chance you didn't know about any of these alleged steamy situations when they were actually happening. Get some graph paper and brush up on your celebrity geometry, because these secret love triangles are real head-scratchers...

Including:
David Spade, Lara Flynn Boyle, and Jack Nicholson | 0:24
January Jones, Bobby Flay, and Stephanie March | 1:24
J.C. Chasez, Eva Longoria, and Tony Parker | 2:23
John Mayer, Giada de Laurentiis, and Todd Thompson | 2:51
Michelle Trachtenberg, Ashlee Simpson, and Pete Wentz | 3:53
Olivia Munn, Justin Timberlake, and Jessica Biel | 4:32

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