Some celebrities must spend their lives in the salon -- when they're not walking the red carpet or being harassed by paparazzi at Starbucks, of course. They go from blonde to brunette, long to cropped and back again (thanks to extensions!). Check out these celebs' changes -- did they make the right move or should they fire their stylists stat?

With its edgy bangs and close-cropped back, Rihanna's haircut is beginning to rival her in notoriety. If you're looking for a way to stand out in a sea of Katie Holmes bobs or the classic long-locks-with-layers-'dos, then check out these hot photos of Rihanna's versatile hair. Whether it's piecey or soft, colorful or not, she always turns heads.

Barrettes, flowers, headbands and jewels are an easy way to glam up your average hairstyle. A simple ponytail or side-part can be taken to a whole new level with the right accessory. Take a nod from these stars who've got the accessories bit down.

Cutting bangs is a daring move that requires a lot of maintenance -- who wants to get a trim every two weeks? Apparently, these celebs do. From soft and side-swept to bold and blunt, see whose styles we'd emulate ... if we had the guts.

Ponytails are so simple and chic -- you really can't go wrong with them. But just like you wouldn't wear sweatpants to a black-tie affair, sometimes this effortless 'do needs an upgrade. See how these celebrities have made ponytails sexy enough for a red carpet night out.