All Good Things (Come To An End) - Nelly Furtado x Quarterhead

Chris Martin from Coldplay helped out on this track. He and Furtado are old friends, and they ran into each other at the 2005 MTV Video Music Awards, where she invited him to come by the studio where she and her producer Timbaland were working on Loose. Martin dropped by and sat in on keyboards for the song, which was a last-minute addition to the album.