Whenever I hear the words "Rihanna" and "hair" used in the same sentence, my first reaction is to scroll through Twitter to see what the rebellious young star has done. Since breaking out of the mini-Beyoncé mold of long, chestnut brown hair, super bronzed skin and glossy pink lips, Riri has been on quite the beauty streak.

Of course, props are due to celebrity hairstylist Ursula Stephen for giving Rihanna that razor sharp, jet black bob to belt out "Umbrella" (Ella ella eh eh eh). Yet, the "Unapologetic" singer gave the classic short haircut a fresh take with her risqué stage outfits and smoldering eye makeup. But that didn't last very long, as with every album Rihanna released, she debuted a brand new hair color. From "Rated R" honey-blonde to "Loud" fire engine-red to "Talk That Talk" dirty brown.

One would be quick to think that Rihanna's constantly-changing style is a cry for attention (or Instagram likes), but she'd be the first to shoot that assumption down. “I don’t do things for the response or for the controversy,” she told Access Hollywood. “I just live my life.”

In celebration of Rihanna's 25th birthday on Wednesday (Feb. 20), we're looking back at her many hairstyles -- and makeup looks -- over the years. Be sure to vote for your favorite 'do in the slideshow below.

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Check our other Beauty Evolutions here.

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