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Jennifer Lopez, Casper Smart


It looks like things are definitely back on for Jennifer Lopez and Casper Smart!

The on-again, off-again couple just came back from a low-key, getaway vacation with the "Booty" singer's kids. Casper and J.Lo headed to Mexico with her children on April 4 and returned shortly thereafter on April 6, which also doubles as Casper's birthday. Talk about a quick and celebratory jaunt!

As E! News reported, the whole gang traveled for several hours before stopping at a San Diego County gas station for snacks and a quick trip to the bathroom. Once they crossed the border, they stopped in a small resort town by Ensenada.

But now an eyewitness tells E! News that the group walked around, grabbed some lunch at a "hole in the wall" restaurant and toured the national park, La Bufadora. Although they were down there to have a good time, the source tells us that Lopez seemed a little frazzled.

"J.Lo seemed to be stressed out about trying to stay unnoticed and maybe a little bored," the source says. "Overall, it seemed like Casper was much more comfortable and relaxed there than she was."

While Max and Emme's mom took care of them, Casper jet skied and hung out with his friends, getting even more truck-driving time in than he thought! While he was out on the water, the "Jenny From the Block" crooner stayed on the beach where her twins got horseback riding lessons.

At night they retreated to the private house in the gated community they were staying in, which came with its own local security. Lopez also brought along her own team for extra protection.

Even though these two have been spotted taking cute bike rides together and are even vacationing together, the "On the Floor" singer insists they're just friends. "I am single right now, thank you," Lopez told E! News when asked about the romance rumors after a taping of American Idol.

Smart added at a separate premiere, "We're very close…We're very good friends." 

—Reporting by Michelle Falls