Nick Jonas & Demi Lovato Celebrate 'Cool For the Summer' Success

Check out Nick Jonas and Demi Lovato rocking cool sunglasses in a brand pic on Instagram!

“Celebrating @ddlovato number 1 with @dmcigars 24k gold cigars. #coolforthesummer,” the 22-year-old “Chains” singer captioned the pic to celebrate Demi‘s song “Cool For the Summer.”

PHOTOS: Check out the latest pics of Nick Jonas

Demi added on Twitter, “Nothing like one of your business partners/best friends showing up to support you!!! #COOLFORTHESUMMER.”

In case you missed it, Demi premiered “Cool For The Summer” earlier this week, and it has reached number one on iTunes.

Bigger pic inside…