Jennifer Lopez was forced to shell out $6,000 for swimming pool repairs after her son's potty training went awry. The singer and hubby Marc Anthony were hit with the huge bill after three year-old Max had an 'accident'. "He took a $6000 dump in the pool," Anthony revealed. "He had an accident in the pool but it got into the filter system and they charged me $6000 to clean it. That was the most expensive... yeah." Anthony, 41, opened up about life at home with son, Max, and daughter, Emme, during an appearance on Jay Leno's US chat show. The Grammy Award winner said he and J-Lo were currently trying to potty train their twins - but confessed the toddlers could be a bit sneaky. "Potty training is in full force, but they figure out things. I don't know how they do it," he said. "Every time they use their potty we give them a lollipop. Then a few days passed and we ran out of lollipops. I'm like 'You should probably get them checked out if they're using the potty that much.'" Anthony and Lopez celebrated their seventh wedding anniversary earlier this month.