In 2008, Watson performed in the Bonachela Dance Company production "Square Map of Q4" at the Queen Elizabeth Hall, singing music created by Marius de Vries (producer of the film Moulin Rouge! and performers such as Madonna and Björk). Later that same year, Watson completed a UK tour of arenas in Birmingham, London, Manchester, Sheffield, Belfast, and Dublin. She sang as the lead performer with Young Voices to sold-out arenas of up to 19,000 people, including The 02 and the Royal Albert Hall. Watson also opened up the Julia Clancey fashion show at Smashbox Studios during the 2008 Los Angeles Fashion Week, singing "Mal di Luna", a vocal arrangement of "Moonight Sonata" by Ludwig van Beethoven.