Kate Upton is pissed at the folks over at Celeb Jihad for posting these fake topless photos of her. She unleashed the Sports Illustrated's lawyers on them and is threatening to sue. Via TMZ:
It's clearly a fake  ... but Sports Illustrated's legal team doesn't care  -- they fired off a letter to the site threatening to sue if the post isn't taken down, STAT.

In the letter, the lawyer complains, "One of these photographs has even been airbrushed."
Clearly? Or not?