over singles; they also increased public interest in psychedelic drugs and Eastern spirituality, and furthered advancements in electronic music, album art and music videos. In 1968, they founded Apple Corps, a multi-armed multimedia corporation that continues to oversee projects related to the band's legacy. After the group's break-up in 1970, all principal former members enjoyed success as solo artists and some partial reunions have occurred. Lennon was murdered in 1980 and Harrison died of lung cancer in 2001. McCartney and Starr remain musically active. The Beatles are the best-selling music act of all time, with estimated sales of 600 million units worldwide. They hold the record for most number-one albums on the UK Albums Chart (15), most number-one hits on the US Billboard Hot 100 chart (20), and most singles sold in the UK (21.9 million). The band received many accolades, including seven Grammy Awards, four Brit Awards, an Academy Award (for Best Original Song Score for the 1970 documentary film Let It Be) and fifteen Ivor Novello Awards. They were inducted into the Rock and Roll Hall of Fame in 1988, and each principal member was inducted individually between 1994 and 2015. In 2004 and 2011, the group topped Rolling Stones lists of the greatest artists in history. Time magazine named them among the 20th century's 100 most important people. History 1956–1963: Formation The Quarrymen and name changes In November 1956, sixteen-year-old John Lennon formed a skiffle group with several friends from Quarry Bank High School in Liverpool. They briefly called themselves the Blackjacks, before changing their name to the Quarrymen after discovering that another local group were already using the name. Fifteen-year-old Paul McCartney met Lennon on 6 July 1957, and joined as a rhythm guitarist shortly after. In February 1958, McCartney invited his friend George Harrison, then fifteen, to watch the band. Harrison auditioned for Lennon, impressing him with his playing, but Lennon initially thought Harrison was too young. After a month's persistence, during a second meeting (arranged by McCartney), Harrison performed the lead guitar part of the instrumental song "Raunchy" on the upper deck of a Liverpool bus, and they enlisted him as lead guitarist. By January 1959, Lennon's Quarry Bank friends had left the group, and he began his studies at the Liverpool College of Art. The three guitarists, billing themselves as Johnny and the Moondogs, were playing rock and roll whenever they could find