The first thought that may be running through your head, aside from, why does Sarah post things like this? is probably, am I looking at the front or the back? Ah...there's a zipper: it must be the front! But there's no visible penis, so it must be a girl. Right? Right? Then you wonder what female in Hollywood has thighs like that. Maybe Kirstie Alley. But she wouldn't be caught dead in maroon pants.
Ah ha! It's Jack Osbourne! Changing into undies at the beach! But he is wearing a Scorpions t-shirt, so I have to give him some sort of credit. Though none at all for matching it with maroon shorts.