Hollywood To You / BACKGRID

Julianne Hough wears a tiny sports bra exiting exercise class in Studio City after landing Heidi Klum‘s coveted job on America’s Got Talent.

The former DWTS judge looked fit and sweaty after stepping out of her exercise class wearing the small green sports top and matching yoga pants.  She wore black round sunglasses with metal trim and was carrying her backpack and reusable water bottle.

The inspiring star asked her followers to stay ‘curious’ in an Instagram post about having a positive perspective in life.

‘Stay curious. The best thing you can do for not only your mind, but also your soul, is to never stop learning…open yourself up to be vulnerable to new and exciting thoughts and theories. & with all that being said…I can’t wait to share what I’ve been creating for all of you!’ – the new America’s Got Talent judge said to her 4.5 million followers.

Hough will join Gabrielle Union who’s replacing Mel B as new judges on the widely popular talent show.  Simon Cowell and Howie Mandell remain in their judging chairs.

ET reached out to show producers about the big shakeup – “It was a network decision. The show does well because it has no problem adding new people and making changes,” the source adds. “Also, Heidi,  Mel B and Tyra [Banks] have major projects coming up that they need to focus on. There was no drama.”

Derek Hough Busts Out Some Dance Moves While Out with Sister Julianne Hough