Stars -- times two! From beloved blonde duo Mary-Kate and Ashley Olsen, to Scarlett Johansson and her hunky twin brother, Hunter, see which famous stars have the twin chromosome!
Benji Madden and Joel Madden
Tattooed twins! These two identical twins rose to fame through their band Good Charlotte, taking Hollywood -- and its gorgeous ladies -- by storm. Benji has dated stars like Paris Hilton and Holly Madison while his twin brother, now married to Nicole Richie, was once linked to Hilary Duff.