In August 2004, Björk performed the song "Oceania" at the Opening Ceremony of the 2004 Summer Olympics in Athens. As she sang, her dress slowly unfurled to reveal a 10,000 square foot (900 m2) map of the world, which she let flow over all of the Olympic athletes. The song "Oceania" was written especially for the occasion and features the talents of Shlomo, a Leeds-based beatboxer, and a London choir. An alternative version of the song began circulating on the Internet with additional vocals by Kelis. It originally appeared on the promotional "Oceania" single released to radio stations and later became available to the public as a B-side of the "Who Is It" single, which charted at number 26 in the UK. This was followed in early 2005 by "Triumph of a Heart", charting at number 31. A video for the potential next single, "Where Is the Line", was filmed in collaboration with the Icelandic artist Gabríela Friðriksdóttir in late 2004. This was initially a sequence from an art installation movie of the artists but was released exclusively on the "Medúlla Videos" DVD as an official promo for the track.