8. Stevie Nicks & Lindsey Buckingham (Fleetwood Mac) - Dakota Johnson & Justin Timberlake
The Premise: One of the greatest albums of all time, 'Rumours', is recorded during the relationship break-up of the band's two biggest creative forces. Cue every classic rock fan screaming at their computer screens at the suggestion that former boyband member Justin Timberlake could actually hack playing Fleetwood Mac star Lindsey Buckingham. This role though would be perfect for Timberlake. Few could actually deliver the vocal performances that the film would require, and his acting talents perhaps peak in roles that rely on fiery chemistry with an other half (whether he's competing with Andrew Garfield or flirting with Mila Kunis). Dakota Johnson could likewise give a sultry, twisted performance as Stevie Nicks, as the pair continue to work together within their band, despite their own break-up. It's a story that would make for an interesting movie, with occasional romantic undertones and probable heavy drug use (it was the 70s, let's face it). Even Stevie Nicks has talked about the possibility of a movie in the past, but claims that her first choice to play her - Reese Witherspoon - is probably too old now.