From the Tumblr blog of the same name. Link from Jody.
David Lee Roth + Sean Penn + The Beastie Boys
Dames Judi Dench + Maggie Smith
Al Pacino + Christopher Walken
Prince + The Prince
Marlene Dietrich + Amelia Earhart
Groucho Marx + George Carlin
John Lennon + Mick Jagger
Dean Martin + John Wayne
Lots more here.
