Hollywood stars love to bare all in the name of art. Besides, they're getting paid millions, so it can't hurt to give us a flash here and there all to enhance a movie's plot (of course). That doesn't quite explain why Lindsay Lohan bared her boobs in Machete or Angelina Jolie's 3D bust in Beowulf.Still, there once was a time when the only bits and bobs we'd see from actors were in obscure indie films and porn.