Burnin' Up! Nick Jonas & Brother Joe Turn Heads With Their Impressive Muscular Physiques

'Cause I'm burnin' up, for you baby! Nick Jonas and his older brother, Joe Jonas, really know how to turn heads.

The Jonas Brothers, minus one brother, were spotted out and about together on Ventura Blvd. in Studio City.

Clearly, Nick has been working on those arms!

The former "Lovebug" singers have come a very long way from their squeaky clean Disney Channel days.

We need a ticket to the gun show, ASAP!

What do you think of Nick and Joe's outing? Let us know your thoughts in the comments section!