JLo spotted lip-locking with Casper Smart

Singer Jennifer Lopez and beau Casper Smart were spotted kissing backstage during the shooting of the 14th season of "American Idol".

The 45-year-old singer and the 27-year-old choreographer stayed close to one another for the majority of the workday, even leaving in his white convertible together after she wrapped up production, reports dailymail.co.uk.

Lopez wore a body-hugging nude leather dress which she paired with Christian Louboutin heels.

The "On the floor" songstress looked stunning with her blonde locks styled in a half up-down hairdo.

She later changed into a more comfortable getup and tied her long hair in a high ponytail whilst remaining within arm's distance of her reunited beau.

They were last seen together at the Los Angeles premiere of the DreamWorks animated movie "Home", in which she voices the character Lucy and he oversees the film's choreography.

Lopez and Smart dated for close to four years before parting ways in July 2014.

He was accused of exchanging messages and passionate photographs with two transsexuals Sofie Vissa and Xristina Marie in the summer of 2014.

Those close to the mother of two said she and Smart split about two months before the cheating allegations began and that his meetings with the models were "as a single guy".

Since the sexcapade rumours surfaced, he denied ever meeting the two transsexuals and threatened to sue the websites that reported the alleged meetings if they did not retract the stories.

The pair stepped out together in fall 2013 just a few months after JLo split from husband of seven years Marc Anthony, during which Smart was a constant in her life as her Dance Again world tour's chief choreographer.

The Puerto Rican beauty has confessed in the past that Smart remains very close to her twins Max and Emme, but also insisted that she is not dating anyone at the moment.

"I mingle a little bit here and there, but you know, I'm single," Lopez previously said.