Emma Stone, Rihanna, Hair Color
Credit: Steve Granitz/WireImage; RD/Orchon/Retna Digital; Dave J Hogan/Getty; Kyle Rover/

Summer's around the corner, and it's a perfect time to switch up your hair color. And the celebrities know it! These six stars underwent amazing hair transformations this year, and we want to know which hues you loved most. Vote for your top picks in the poll below.

Update: This poll is now closed.

Emma Stone
Credit: RD/Orchon/Retna Digital; Steve Granitz/WireImage; Gregg DeGuire/PictureGroup
Katy Perry
Credit: Jon Kopaloff/FilmMagic; Charles Eshelman/FilmMagic; Jeff Kravitz/FilmMagic
Credit: Munawar Hosain/Fotos International/Getty; Peter Brooker/Rex USA;
Credit: Jun Sato/WireImage; Dave J Hogan/Getty; Kyle Rover/
Credit:; Jon Kopaloff/FilmMagic; Alberto E. Rodriguez/WireImage
Willow Smith
Credit: IXOLA/AKM-GSI; AKM-GSI; Kevin Winter/Getty