Selena Gomez: I'm 'Taking My Power Back' (In My Bikini)

Selena Gomez attends the American Ballet Theatre 2014 Opening Night Spring Gala at The Metropolitan Opera House on May 12, 2014 in New York City -- Getty Images

Watch out, world! Selena Gomez is feeling empowered.

After a rough patch of romance drama with sometimes-boyfriend Justin Bieber, a falling out with pal Taylor Swift and a trip to rehab, the 21-year-old star has let her Instagram followers know she's ready to come back with a vengeance - and a bikini-ready bod.

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"Taking my power back.. can't wait to show you where I've been," she captioned a pic of herself sporting a tiny yellow bikini, sitting in the waves on Tuesday. "I love y'all. Ps, I still obsess over pickles."

And the "Come and Get It" singer was feeling inspirational on Sunday as well.

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Selena posted a photo of a screengrab from Oprah's "Lifeclass" with Bishop T.D. Jakes, with a quote from the pastor, which read, "You can't be who you're going to be and who you used to be at the same time."

-- Erin O'Sullivan

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