New Music: Rocko ft Juelz Santana – Muscle Up ,Rocko and Dipset’s Juelz Santana are ready to pump you up with a new tag-team single. You can catch them flexin’ together on the latter’s new tune, “Muscle Up”. Behind the booming, bass-knocking production from TM88, Rocko and Juelz makes sure their listeners know just how strong they are, with a catchy hook that repeats, “Flex, put your muscle up,” which they follow up with notable verses to cement this one as a true banger. Listen to it below and tells us what you think?