Idris Elba joins Sydney band Lime Cordiale on stage for a surprise show By 4 weeks ago Idris Elba sent fans into a frenzy after making a surprise appearance during a live gig at Sydney's Enmore Theatre last night. The British actor, 48, joined Aussie band Lime Cordiale on stage for a collaboration performance of their song 'Unnecessary Things', plus his own rap verse to a new, unreleased song. READ MORE: 14 Steps to a Better You (Relapse). Australian brothers Louis Leimbach and Oliver Leimbach from Sydney band Lime Cordiale. (James Brickwood) Meanwhile, Elba is currently in Sydney for the pr...