In Jennifer's Body she was covered in blood, but in this pic from the upcoming Jonah Hex, beautiful Megan Fox is glistening with sweat.The movie, in which Megan Fox plays a prostitute armed with guns, is packed with action. It's the kind of action where the attractive young actress gave her blood and sweat to fit the part....literally. The corset she wears had an 18-inch waist!"At the end of the