Guess The Celebrity: Who's That Bikini Clad Celeb That's Baring Their Sexy Rock Hard Abs Underwater?!

WOW! What a picture perfect moment!
Summer is coming to an end but this starlet is saying farewell to the hot season with some underwater fun!
Hm, the lighting underwater looks AH-Mazing because her gams and abs look so defined, it’s not even funny!
So, just who is that fit celeb doing underwater tricks in their pool? That scallop trimmed bikini is pretty telling…
The impressive body belongs to…Hilary Duff!
The Duffster posted this fun photo on Instagram, captioning it:

Under water flip.

Girlfriend must love that bikini because she’s worn it on multiple occasions, but we don’t blame her!
It’s very fitting for that hot bod of hers!
[Image via Hilary Duff/Instagram.]