British pop star Jessie J battled through sleep deprivation on Friday (22May15) as she kicked off U.S. breakfast show Good Morning America's Summer Concert Series with an early gig in New York's Central Park. The singer, who has just wrapped up her first headlining U.S. tour, flew into the Big Apple from Los Angeles and headed straight to work. She said, "We landed at 1.30am... and we went back to the hotel and all of us had breakfast. We started getting ready at three and we got here at six!" Jessie J's schedule isn't going to get any easier - she will be back on a plane on Friday evening to fly to Stockholm, Sweden, where she will embark on the European leg of her tour.