Jennifer Lopez and her rumoured boyfriend were reportedly spotted kissing and holding hands at the American Music Awards (AMAs) after-party.

Jennifer had performed on stage at the event in a raunchy nude catsuit earlier in the night.

After the awards ceremony, she was seen looking cosy with backing dancer Casper Smart at Greystone Manor in Los Angeles.

Jennifer arrived at the event in a white fringed dress.

According to Us Weekly, she stayed close to 24-year-old Casper throughout the night. The couple hung out in a private booth and occasionally danced together. She kissed him on the head and sat on his lap while she spoke to other celebs such as Jenny McCarthy, Chris Brown, Lance Bass, Pitbull and Mary J. Blige.

The American Idol judge and her new beau have allegedly been dating for weeks, although they are yet to make it official.

At around 1am the pair called it a night and left hand-in-hand, accompanied by Jennifer's entourage.

The On the Floor star announced her split from her third husband Marc Anthony in July.

Despite both attending the awards last night, Marc and Jennifer kept their distance from one another and managed to avoid meeting.