See Hollywood's inseparable wingmen
Benji & Joel Madden
Identical twins who formed the band Good Charlotte, the Madden bros spent quite a bit of time together during their teen years -- out of necessity. "We definitely weren't going on a lot of dates," Benji told MTV's When I Was 17. "[We were] awkward. Basically just like we are now, but a little shorter and a little chubbier."