A photo has been circulating showing a scene from the recent Rose Bowl in which a USC cheerleader seems to be celebrating a Texas touchdown. Snopes has posted the picture, but is skeptical of the claim that the cheerleader was cheering after a touchdown by the opposing team. They write: "the image appears to represent not a brainless cheerleader who couldn't tell that the other team had just made a touchdown, but a play that resulted in a close scoring call, with the on-field Texas players signaling their belief that their team had scored, while from other vantage points (such as the cheerleader's sideline view, especially if the goalposts, referee, or other players had momentarily blocked her view) it might have looked at first glance as if USC had successfully stopped Texas short of the goal line."
I'd agree that it's very hard to tell when during the game this picture was taken, and without that information it's basically impossible to know why the cheerleader has her arms raised. Though it does seem odd that no one from USC is cheering, except for her (and the picture really doesn't look photoshopped). Plus, the two cheerleaders to her right do seem to be giving her a funny look. The cheerleader in question has been identified as Natalie. The image was first posted on a Bruin's message board (which makes it a pretty biased source).