(L-R) Billie Eilish, Lizzo, Lil Nas X and Finneas O'Connell attend the 62nd Annual GRAMMY Awards on January 26, 2020 in Los Angeles, California Image: Eilish with Lizzo, Lil Nas X and O'Connell at the 62nd annual Grammy Awards in Los Angeles When We All Fall Asleep, Where Do We Go? was reported to be the highest-selling debut album of 2019 and the biggest North American debut of the decade, shifting 313,000 units in the first week. Eilish also became the youngest female solo artist to score a number one album in the UK. Just a few weeks later, it was announced her performance at Glastonbury 2019 was being bumped up the Other Stage, the festival's second biggest, to cope with her soaring numbers of fans. This year, Eilish will embark on her Where Do We Go? world tour, with dates in Europe, South America and North America, as well as five dates in the UK. Image: Eilish was moved to a bigger stage for Glastonbury 2019 as her fanbase rapidly expanded The teenager has spoken op…