The “Rehab” singer was given permission to perform in the country after being questioned in a formal interview at the American Embassy in London’s Grosvenor Square.Amy had previously been refused entry to the US after she, husband Blake Fielder-Civil and stylist Alex Foden were fined for possession of marijuana in Norway during her European tour last month. A source said: “Amy is delighted. She made a real effort to look good and come across well in her interview because she really wanted to make a good impression.” “She’s desperate to be able to tour the US, and there’s even been talk of her and her and Blake looking for a house in Miami.” Source