Katy Perry
We all saw Katy Perry's blue wig, but it seems like this time she went all the way, dying her long blond tresses all one shade of bubblegum pink. While many stars have been doing a few streak here and there, Katy tweeted about a hair color transition in June, so there's probably a big reveal coming up soon. Could it be that she still hasn't reached her desired shade? [via]