With atmospheric instrumentals, ethereally non-distinguishable lyrics and slow rhythms, the Scottish band Cocteau Twins helped define the modern dream pop genre. Formed in 1979 by vocalist Elizabeth Fraser, multi-instrumentalist Robin Guthrie and bassist Will Heggie, the group released its debut album Garlands, in 1982 on the indie label 4AD. The album was defined by downtempo drum loops, Fraser's characteristic singing and rhythmically lurching bass lines for a style that would ultimately fade out after Heggie left the group in 1983. Though it lost one of its founding members, the Cocteau Twins managed to add another talented musician to its lineup and persevere with albums that consecutively managed to impress both critics and audiences. The group's album Heaven or Las Vegas, released in 1990, was its best-charting album and helped solidify the Cocteau Twins' reputation as a premier art-inspired music outfit of its generation. Though the group broke up in 1997, it has teased fans with rumors of a reunion occasionally, most notably when the Cocteau Twins was slated to perform at the Coachella Valley Music and Arts Festival in 2005 but ultimately backed out.