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2. Wearing a Bindi.
The biggest Selena Gomez scandal to date happened when she placed a Bindi on her forehead for a Bollywood-themed performance at the MTV Movie Awards in April. Rajan Zed, leader of the Universal Society of Hinduism, issued a statement that read, "The bindi on the forehead is an ancient tradition in Hinduism and has religious significance . It's not meant to be thrown around loosely for seductive effects or as a fashion accessory aiming at mercantile greed. Selena should apologize and then she should get acquainted with the basics of world religions." Gomez didn't apologize, and instead she rocked a Bindi several more times, although she did eventually explain why she went with the look. "I think the song has that Hindu, tribal feel and I wanted to translate that," Gomez said on New York-based Z100's Elvis Duran and the Morning Show. "I've been learning about my chakra and bindis and the culture … It's beautiful."

Selena Gomez's Bad-Girl Moments

Selena Gomez is a good girl, but the former Disney diva has had her bad-girl moments. In honor of her 21st birthday — a time when all of us have been known to cut loose — on July 22, take a look back at the rare instances when Selena showed her naughty side.