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She's really sexing it up these days!

Selena Gomez decided to treat her Instagram followers to a booty-ful pic of her seductively posing in the mirror today, and the "Come & Get It" singer even dropped hints about having something in the works!

"Secret project," she captioned the snapshot.

Something tells us it might be a new music video with on-again bad boy boyfriend Justin Bieber!

After all, last month The Biebs posted a video of the pair practicing a sizzling routine at a Texas dance studio, so perhaps that was an attempt to tease fans about a future collaboration?

If this is what we think it is, somewhere Taylor Swift is breaking out her voodoo doll!