Roger Waters is a founding member of the super group Pink Floyd, serving as bassist and co-lead vocalist. Following the departure of Syd Barrett in 1968, Waters became the band's lyricist, principal songwriter and conceptual leader. The band subsequently achieved international success in the 1970s with the concept albums The Dark Side of the Moon, Wish You Were Here, Animals and The Wall. Waters left Floyd in 1985 and began a legal battle with the remaining members over the use of the group's name and material. They settled out of court in 1987, and nearly eighteen years passed before he performed with Pink Floyd again. The group has sold more than 250 million albums worldwide. Waters' solo career has included three studio albums. In 1990, he staged one of the largest and most extravagant rock concerts in history, The Wall – Live in Berlin, with attendance of 200,000. He has toured extensively as a solo act since 1999 and played The Dark Side of the Moon in its entirety for his world tours of 2006–2008. In 2005, he reunited with Pink Floyd band mates Nick Mason, Richard Wright and David Gilmour for the Live 8 global awareness event; it was the group's first appearance with Waters in 24 years. In 2010, he began The Wall Live, a worldwide tour that features a complete performance of The Wall. Waters' tour topped international concert ticket sales for the first half of 2012, selling more than 1.4 million tickets globally. Roger Waters continues to perform all over the world.