Did you feel a little weird this week? Don't worry, it wasn't just you, as Mercury was just super in retrograde. The celebs feeling this astrological event that tends to cause (or allow) people to make crazy changes? Katy Perry and Ariel Winter, with the American Idol judge and the Modern Family star debuting dramatic new hairdos, while Stranger Things star Joe Keery made headlines again for another major hair change to his signature locks that was a blast from the past. In non-follicle