Article continues below advertisementJulianne Hough is looking hotter than ever!Article continues below advertisementThe Dancing With the Stars host jumped on Instagram to drop a steamy sauna selfie while rocking a micro yellow G-string bikini. The 37-year-old angled the camera downward as beads of sweat glistened across her toned body. Her cheeks looked rosy from the heat, as she tagged the moment with a yellow heart emoji that matched her tiny suit.