Jennifer Lopez has a sense of humor about her past. During a recent performance at her Las Vegas residency, ‘Jennifer Lopez: Up All Night,’ aka ‘The J.Lo Show,’ the singer invited a fan onstage at Caesar’s Palace’s Colosseum for a fun moment, but things took a turn when he revealed his name was Ben. J.Lo reacted by letting out a quick ‘ugh’ before laughing it off. The moment comes two years after her (second) split from Ben Affleck.