Dh is watching The Orville my god it's shit and one of the characters has just had her younger self appear. New version has a dodgy nylon wig in a different style (fringe and pony tail) so everyone can easily tell them apart, just like Gwynnie's big chop in Sliding Doors.
So, what would your doppelganger's hairstyle be? I'd love to but I'm not brave enough to shave my hair so I think I'd like to see me with a half inch fuzz.