What is Selena's secret?

Selena Gomez shared a sexy snapshot on Instagram Tuesday, showing off her assets in a sheer, backless top and black shorts.

"... Secret project," she wrote along with the sultry photo.

In the pic, the "Come & Get It" singer pulled her brunette locks up in a messy bun as she stared seductively into the mirror.

The former Disney darling has been showing her wild side on the social media site. Last week, she posted a nearly-naked snapshot in front of a see-through window curtain.  

While it's unclear what the 21-year-old's "secret project" might be, she's clearly back to work after canceling the Australian leg of her tour back in December.

"My fans are so important to me and I would never want to disappoint them," Gomez said in a statement at the time.

"But it has become clear to me and those close to me that after many years of putting my work first, I need to spend some time on myself in order to be the best person I can be," she added. "To my fans, I sincerely apologize and I hope you guys know how much each and every one of you mean to me."

We're happy to see Selena back on track!

What do you think of her seductive snapshot? Tell toofab in the comment section below, and click "Launch Gallery" above to see more sexy celebrity TwitPics. 

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