AceShowbiz -

Jennifer Lopez and her ex-boyfriend Casper Smart fueled speculation that they may be a couple again. The on-again, off-again pair were spotted sitting side by side during the 2015 Billboard Music Awards event on Sunday, May 17.

Jennifer, who showcased a huge amount of flesh in a sheer silver dress, and the choreographer/dancer arrived at the awards event separately. Casper was seen keeping coy while the two were sitting together in the front row of the awards show, pretending to be ignorant of Jennifer's presence.

Jennifer and Casper split last summer after two years of dating, but lately they were frequently seen spending time together. On March 26, the former couple was caught kissing in an episode of "American Idol". They were also spotted having a trip to Mexico early last month along with Jennifer's twin kids Max and Emme as a part of Casper's 28th birthday celebration.

Earlier this month, Jennifer addressed her relationship with Casper as she dropped by "The Ellen DeGeneres Show". "Have you ever been at a point in your life where you don't know?" she told Ellen DeGeneres. "Like you're not sure about things? Well, that's all. I am not sure about anything."

"I'm a grown woman," the singer continued. "I'll say it. I'll say, 'You know what, this is going down.' But right now I just feel like ... I am me."