Nick Jonas Shows Off Buff Arms in NYC

Nick Jonas shows off his buff arms while talking on the phone on Saturday afternoon (November 16) in New York City.

The 21-year-old Jonas Brothers singer stopped to pick up Jamba Juice after enjoying a solo workout session.

PHOTOS: Check out the latest pics of Nick Jonas

“8 years since I was diagnosed with diabetes today. To all my diabetics out there #staystrong,” the musician tweeted that same day.

Just last week, Nick joined his brother Joe Jonas for a performance at the 2013 Telehit Awards Concert in Mexico City, Mexico.