Jennifer Lopez has a new younger man on her arm, and a new younger look to match!

The recently separated singer, 42, showed off fuller, plumper lips in New York City on Tuesday – all the better for kissing new love, 24-year-old Casper Smart! - and prompting speculation that she has gotten cosmetic surgery.

“Has J. Lo become an Idol for plastic surgery?” asked celebrity surgeon Dr. Anthony Youn, who has not treated the star.