Klaus Voormann (born 29 April 1938) is a German artist, musician, and record producer. He designed artwork for many bands including the Beatles, the Bee Gees, Wet Wet Wet and Turbonegro. His most notable work as a producer was his work with the band Trio, including their worldwide hit "Da Da Da". As a musician, Voormann is best known for being the bassist for Manfred Mann from 1966 to 1969, and for performing as a session musician on a host of recordings, including many by former members of the Beatles.His association with the Beatles dated back to their time in Hamburg in the early 1960s. He lived in the band's London flat with George Harrison and Ringo Starr after John Lennon and Paul McCartney moved out to live with their respective partners, and designed the cover of their album Revolver, for which he won a Grammy. Following the band's split, rumours circulated of the formation of a group named the Ladders, consisting of Lennon, Harrison, Starr and Voormann. This failed to materialise, outside of all four Ladders (plus Billy Preston) performing on the Ringo Starr track "I'm the Greatest", although Voormann did play on albums by Lennon, Harrison and Starr, and was for a time a member of the Plastic Ono Band. In the 1990s, he designed the artwork for the Beatles Anthology albums.In 2009, he released his debut solo album A Sideman's Journey, which featured many notable musicians, including the two surviving members of the Beatles, performing as "Voormann and Friends".