The couple was spotted bringing in the New Year in Miami with a weekend of clubbing, dining and yacht partying, according to People.
So where was the first stop on their trip?
Hot spot Amnesia.
And the "On the Floor" songstress and 24-year-old Smart weren't shy about getting hot and heavy on the dance floor, where they partied until 3 a.m.
"They were very sexy with each other, dancing and bouncing around and making out," a source told the mag. "They couldn't help but attract attention, although Jennifer was trying to lie low from onlookers."
The next day, the American Idol judge and Smart enjoyed a more intimate outing, hopping aboard a $10 million yacht owned by a friend, where they remained the rest of the day canoodling and spending time with Lopez's little ones, who were also in tow.
But that wasn't the end of their getaway.
Saturday evening the couple headed to a private dinner at Soho Beach House with a group of friends.
Lopez's ex, Diddy, was also in Miami New Year's weekend, hosting a big bash at a private estate that attracted the likes of NeNe Leakes, Queen Latifah, Vivica Fox and Rihanna, who made waves when she showed up to the party in a sheer dress that revealed her nipple ring.