Who has played in more musical projects, Christine McVie or Michael Kiske?
Christine McVie:  She is best known as the keyboardist and co-lead vocalist of the band Fleetwood Mac, which she joined in 1970 while married to bassist McVie. Michael Kiske: Michael Kiske (born January 24, 1968) is a German singer best known as the lead vocalist for the German power metal band Helloween. Michael Kiske:  After his departure from the band, Kiske recorded four solo albums, participated on various metal and rock related projects, such as Avantasia, Place Vendome and Kiske/Somerville, while he also performed with numerous bands as a guest vocalist.
Michael Kiske