Asia are an English rock supergroup formed in London in 1981. The most commercially successful lineup was its original, which consisted of four members of different progressive rock bands who had enjoyed great success in the 1970s: lead vocalist and bassist John Wetton (King Crimson, Uriah Heep and U.K.), guitarist Steve Howe (Yes), keyboardist Geoff Downes (Yes and the Buggles) and drummer Carl Palmer (Emerson, Lake & Palmer). Their debut album, Asia, released in 1982, remains their best-selling album and went to number one in several countries. Billboard listed it as the top album in the U.S. in 1982. The lead single from the album, "Heat of the Moment", remains their top charting and best-known song, reaching the top 40 in over a dozen markets. It peaked at #4 in the U.S. on the Billboard Hot 100 and hit #1 on the Billboard Mainstream Rock chart.