In October 2000, Adams participated at Madison Square Garden in the concert of Elton John from which the CD and DVD Elton John One Night Only - The Greatest Hits is released. The CD, the result of two evenings (in spite of the title, which means One Night Only), contains the most popular songs by Elton John performed live, chosen from those performed during the two concerts (therefore it does not contain the full track-list). Many of these are actually duets between the rock star and other famous names in the world music scene: Adams duets with Elton John on the track Sad Songs.