Four hours before Sienna Spiro is due to launch her first US headlining tour, the 20-year-old singer and songwriter from London sits upstairs in the Troubadour’s empty balcony, peering down as several crew members wheel a grand piano onstage.
“The fact that I’m 11½ hours from home and that this room is gonna be filled with people that have never met me and that I’ve never seen before – that’s just crazy,” she says. “I’m kind of scared.”






