Nick Jonas Flashes His Big Biceps at the Gym!

Nick Jonas shows off those huge guns of his while leaving the gym in a tank top after a workout on Monday afternoon (March 3) in West Hollywood, Calif.

The 21-year-old entertainer is taking a little break right now after serving as the musical director on his friend Demi Lovato‘s new Neon Lights Tour, which is currently playing around the country.

PHOTOS: Check out the latest pics of Nick Jonas

“It’s great,” Nick recently told E! News about being a new uncle. “It’s an immediate responsibility and love for someone that you’re going to watch grow up, which is beautiful and I’m just so excited to watch her do that.”