Bell Choir) – 3:49 UK/European DVD "Who Is It (Carry My Joy on the Left, Carry My Pain on the Right)" (Video) – 3:52 "Who Is It (Carry My Joy on the Left, Carry My Pain on the Right)" (Choir Mix) – 7:42 "Mouth's Cradle" (Cortejo Afro / Ilê Aiyê Mix) – 4:00 European/Japanese CD "Who Is It (Carry My Joy on the Left, Carry My Pain on the Right)" (C2n Dattasette Mix) – 4:15 "Who Is It (Carry My Joy on the Left, Carry My Pain on the Right)" (Fruit Machine Mix) – 3:23 "Who Is It (Carry My Joy on the Left, Carry My Pain on the Right)" (Bell Choir Mix featuring The Bústaðakirkja Bell Choir) – 3:49 "Oceania" (featuring Kelis) – 2:55 Credits Credits adapted from Medúlla album booklet. Björk – lead vocals, songwriting, producer, arrangement, programming, bass synth Tagaq – Inuit throat singing Rahzel – beatboxing Mark Bell – programming Matmos – programming Valgeir Sigurdsson – programming Mark "Spike" Stent – mixing Charts References 2004 singles 2004 songs Björk songs One Little Indian Records singles Song recordings produced by Björk Songs written by Björk Songs about mothers