Led Zeppelin were an English rock band formed in 1968 by Robert Plant (vocals), Jimmy Page (guitar), John Paul Jones (bass guitar, keyboards, mandolin) and John Bonham (drums). With their heavy, guitar-driven sound, Led Zeppelin are regarded as one of the first heavy metal bands, helping to pioneer the genre. However, the band's individualistic style drew from many sources and transcends any one genre. Their rock-infused interpretation of the blues and folk genres also incorporated rockabilly, reggae, soul, funk, classical, Celtic, Indian, Arabic, pop, Latin and country. The band did not release the popular songs from their albums as singles in the UK, as they preferred to develop the concept of "album-oriented rock". They charted ten singles in the US. Close to 30 years after disbanding following Bonham's death in 1980, the band continues to be held in high regard for their artistic achievements, commercial success, and broad influence. The band has sold an estimated 200 million albums worldwide, including 111.5 million certified units in the United States and they have had all of their original studio albums reach the top 10 of the Billboard album chart in the U.S.,with six reaching the number one spot. Led Zeppelin are ranked #1 on VH1's 100 Greatest Artists of Hard Rock. Rolling Stone magazine has described Led Zeppelin as "the heaviest band of all time", "the biggest band of the '70s" and "unquestionably one of the most enduring bands in rock history". On 10 December 2007 the surviving members of Led Zeppelin reunited (along with deceased drummer John Bonham's son, Jason) for the Ahmet ErtegÃ¼n Tribute Concert at The O2 Arena in London.