Rainbow hair, don't care! Katy Perry has rainbow hair in H&M's holiday commercial, because of course she does. Perry loves to play with hair hues that are not found in nature. But rainbow hair is not ...

Remember when people went absolutely berserk for these psychedelic rainbow bagels? Bagel fanatics would spend hours in line for a taste of neon, multi-colored bread -- it was undoubtedly one of the ...