Jennifer Lopez & Casper Smart: Video Shoot in Mexico!

Jennifer Lopez shows off her toned tummy in a black sports bra and matching pants by Under Armour on the set of a new music video on Monday (March 12) in Acapulco, Mexico.

The 42-year-old entertainer cozied up to beau Casper Smart while taking a break from shooting her “Follow the Leader” video.

“2nd Video in Mexico with @wisinyyandel #FollowTheLeader Love it here! #LosLideres Siempre al frente!” Jennifer tweeted the day before.

“Day one of shootin with @wisinyyandel @Jlo directed by @JessyTerrero it’s 100 degrees outside.. Lol,” Casper wrote on his Twitter page.

FYI: Jennifer is also wearing a Gucci top.