Other media appearances
Clapton frequently appears as a guest on the albums of other musicians. He played lead guitar and synthesiser on The Pros and Cons of Hitch Hiking, Roger Waters' debut solo album. Other media appearances include the Toots & the Maytals Grammy award-winning album True Love, where he played guitar on the track "Pressure Drop". He played on Paul Brady's 1985 album Back to the Centre on the track "Deep in your Heart". He can also be heard at the beginning of Frank Zappa's album, We're Only in It for the Money, repeating the phrase, "Are you hung up?" over and over again. In 1985, Clapton appeared on the charity concert Live Aid in Philadelphia with Phil Collins, Tim Renwick, Chris Stainton, Jamie Oldaker, Marcy Levy, Shaun Murphy, and Donald 'Duck' Dunn. In 1988 he played with Dire Straits and Elton John at the Nelson Mandela 70th Birthday Tribute at Wembley Stadium and the Prince's Trust rock gala at the Royal Albert Hall. On 30 June 1990, Dire Straits, Clapton and Elton John made a guest appearance in the Nordoff-Robbins charity show held at Knebworth in England. In 1991 Clapton was featured on Richie Sambora's album, Stranger in This Town, in a song dedicated to him, called "Mr. Bluesman". He contributed guitar and vocals to "Runaway Train", a duet with Elton John on the latter's The One album the following year.