Piers Morgan has been gushing about Britain’s Got Talent star, Susan Boyle and insisting that she is still a global superstar.

The show judge told talkSPORT: “Susan’s great. You talk about celebrities, my God, I was in Las Vegas about three, four weeks ago and literally landed at the airport, got in a cab and the cab driver looked at me in his rear view mirror and his opening line was ‘How’s Susan?’. Now that is true global celebrity.

“I’m going back to America for America’s Got Talent on Sunday for two months and out there she is about as big a star as this country has produced over there in 20 years. It’s quite amazing.”