When Selena Gomez arrived at New York's JFK airport on Dec. 15, we had to do a serious double take!

Not only was the actress/singer attempting to remain incognito by hiding under a large hat and a pair of sunglasses, but the typically straight-haired star was also rocking a curly 'do!

Whether the hair is completely hers — or enhanced with the help of extensions — we're kind of digging the au naturel vibe!

Scroll down to see more stars who look completely different when sporting curly vs. straight hair and to hear our thoughts on which suits them better!