Irish singer/actress Samantha Mumba checked out of a top London hotel without paying the GBP2,000 ($3,900) bill. The 24-year-old, who was in the British capital filming Channel 4 reality TV show GET YOUR ACT TOGETHER, was staying at the five star Mayfair hotel and left without paying her bill, which included a bar tab and taxis. Get Your Act Together producer SAM CASH has refused to pay the outstanding amount. He says, "We will not be paying." But Mumba's spokeswoman insists the unpaid bill is simply the result of a misunderstanding. She says, "She was invited to stay by the designer SCOTT HENSHALL. She was told by him that the hotel would cover all bills. In return, she agreed to attend a number of functions."