My Chemical Romance wrapped up their five-night residency at the Kia Forum in Inglewood, California. There, they performed the deepest cut in their entire catalogue: ‘Sister To Sleep’, a song they’d performed live just once before, nearly a decade ago, and never released in any official capacity.Initially written during the sessions for their second album, 2004’s ‘Three Cheers For Sweet Revenge’, the band performed ‘Sister To Sleep’ for the first and only time on June 26, 2003, when they played a small club show in New York City.After the only known recording of it – a low-quality bootleg from the New York show – gained traction in forums and on platforms like MySpace, the song went on to become a cult favourite within My Chemical Romance’s online fanbase.