I've heard rumors about Leonardo DiCaprio and Tobey Maguire having a gay affair for years. I've also heard Elijah Wood can't get enough of it. And Jodie Foster is supposedly a closeted lesbian.
And honestly, I would be shocked if Clay Aiken turned out to be anything but gay, but he's from such a strict Christian background he's ashamed of it.
In the wrestling industry it's well known that former wrestlers/current WWE agents Pat Patterson and Steve "Brooklyn Brawler" Lombardi are a long-time gay couple. Also gay from the wrestling world is Chris Kanyon, and former WWE star Orlando Jordan is openly bi-sexual.