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4. Infuriating Pink.
Gomez found herself the target of criticism from pop star Pink in 2011, when she painted horses pink for her "Love You Like a Love Song" video shoot. Pink, who's 12 years older than Gomez, tweeted that, "Artists should be more aware and responsible for their actions," before she found out who was making the video. But Gomez stood her ground, and her rep issued a statement that, "It was important to the Production Company, Record Label and Ms. Gomez that no animals were harmed and all proper precautions were taken. A non-toxic, vegetable based powder paint was applied via an airbrush and removed with water. An official from the Humane Society was on set supervising." Eventually, though, Gomez cut the pink horses from the clip altogether.

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.