Selena Gomez Hair Evolution

See Selena Gomez's Beauty Evolution

See Selena Gomez's Beauty Evolution

We've watched Selena Gomez grow from a Disney star to a full-grown acting and musical powerhouse. Already this year, she has one blockbuster film in Spring Breakers, and her new album, Stars Dance, is about to be released. Selena's preferences have changed over the years, but if there were two words to describe her go-to style, "fun" and "flirty" come to mind. In honor of the star's 21st birthday today, click through to view her multiple bright hair extensions, bold lip colors, and extreme smoky eye looks.

Source: Getty
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