Apostrophe (')

Hop 1: Peter Gabriel and Sting

both credited on Covering 'Em (1993, Italy) · source

Hop 2: Sting and Frank Zappa

both credited on Broadway The Hard Way · source

Hop 1: Frank Zappa and Eric Clapton

both credited on We're Only In It For The Money / Lumpy Gravy (1986, US) · source

Hop 2: Eric Clapton and J.J. Cale

both credited on The Road To Escondido (2006-11-07, Europe) · source

Hop 1: Cream (2) and Eric Clapton

both credited on Wheels Of Fire (1998, US) · source

Hop 2: Eric Clapton and Frank Zappa

both credited on We're Only In It For The Money / Lumpy Gravy (1986, US) · source

Hop 1: Frank Zappa and Warren Cuccurullo

both credited on You Can't Do That On Stage Anymore Vol. 1 · source

Hop 2: Warren Cuccurullo and Talvin Singh

both credited on th@n.ks 2:/Fr@n.k (1996-03-26, US) · source

Hop 3: Talvin Singh and Björk

both credited on Debut (1993-07-13, US) · source

Hop 1: Aerosmith and Michael Brecker

both credited on Get Your Wings (1977, US) · source

Hop 2: Michael Brecker and Frank Zappa

both credited on Läther · source

Hop 1: Blood, Sweat And Tears and Pete Jolly

both credited on Brand New Day (1978, Italy) · source

Hop 2: Pete Jolly and Frank Zappa

both credited on Lumpy Gravy (1972, UK) · source

Hop 1: Frank Zappa and Jack Bruce

both credited on Apostrophe' / Overnite Sensation (1990-03-00, Europe) · source

Hop 2: Jack Bruce and Lou Reed

both credited on Berlin (1976, US) · source

Hop 3: Lou Reed and The Velvet Underground

both credited on White Light/White Heat (1968-01-30, US) · source