There is more than one group with this name: 1) Ｄｒｅａｍ/DRM/Dream is a Japanese girl group.
2) Dream was an American pop girl-group formed by Diddy from 1998–2003
3) A Norwegian psychedelic band from sixties.
4) Dream is a UK Dubstep artist
5) Swedish melodic hard rock band 1) Dream, formerly called DRM, is an all-female J-pop chorus group. In May 1999, the Japanese record company Avex Trax held a contest in the hopes of looking for new talent. After going through 120,000 Japanese contestants, Mai Matsumuro, Yu Hasebe and Kana Tachibana were chosen to form the new group “Dream”.

Read more about Dream on Last.fm.