Jennifer Lopez and Casper Smart Kissing Pictures in Mexico

Jennifer Lopez and Casper Smart Share Steamy Nighttime PDA on the Set

J Lo carefully kissed Casper Smart as to not mess up her makeup.

Jennifer Lopez hung out with boyfriend Casper Smart on the set of her new music video "Follow the Leader" in Acapulco last night. Jen and Casper shared a kiss between takes, when she wasn't showing off her hot dance moves. J Lo arrived in Mexico over the weekend with Casper, and has since gotten down to work with musicians Wisin & Yandel. Their short getaway will need to wrap up by tomorrow, when Jen is expected back in LA and on the judging panel at American Idol. Last week, contestants belted out songs by Stevie Wonder, and the top 12 will next take the stage to perform songs from the year in which they were born. Do you plan to tune in for the next installment of American Idol?