All indications are that Jennifer Lopez and Casper Smart's on-again, off-again relationship is back on after the two were spotted kissing on the set of "American Idol," where she serves as a judge.

TMZ.com reports Smart came by the show on Wednesday to pick up Lopez, and the two openly kissed for all to see. The website adds, "They've been sprinkling clues for months," such as attending a recent GQ Magazine event together and a Big Sean House of Blues outings.

Smart's dogs were even recently spotted at Lopez's home, though that ended up being more problematic than it should have been. Both Lopez and Smart were sued by a neighbor of the "Selena" star last month, who claimed one of Smart's dogs once bit her and regularly terrorized her.

In her suit, Andrea Ashley claims she was exiting her car back in December when Smart's boxer "mauled her left arm and hand ... leaving her with broken bones and cuts," according to TMZ. Ashely also alleges the same dog escaped through a hole in Lopez's fence back in April and again tried to attack her.

Though Smart had phoned her and offered to pay all her medical bills, Ashley claimed in court documents that she remains afraid the dog could eventually escape again. She told TMZ she named Lopez as a defendant because she feels she "bears some responsibility."
Lopez and Smart recently split after dating for nearly three years. Though they've recently been spotted together on several occasions, Lopez has previously insisted they were now just friends.

TMZ has previously reported Animal Control officials now insist the dog is being held in quarantine at Smart's home.