David Bowie's had a great career, but it can be argued that he's at his greatest when he's collaborating with somebody. It could be a good guitarist, like Mick Ronson, or a good producer, like Brian Eno, or a good singer, like Bing Crosby.
Here are a couple of concerts where he teamed up with another singer, and the results are great.
"Queen Bitch" comes from Hunky Dory, where Bowie notes, "Some V.U. white light returned with thanks." Lou Reed returned the favor in 1997 at this show in Madison Square Garden.
And here's David, in full-on Ziggy regalia, duetting with Marianne Faithfull, who's disguised as a nun. Thank God for the '70s.