Lambert moved Cher to tears with "Believe," and then he and Lauper slayed with "I Got You Babe."
The legend whose life is depicted by three different Broadway divas in The Cher Show showed up to perform "If I Could Turn Back Time" with Stephanie J. Block.
Here's how those unforgettable dance sequences happened.
The Mamma Mia 2 actress blessed us with a cover of "Gimme! Gimme! Gimme!"
The actress/musician, and the musical, get the recognition they deserve.
You can watch Donald Trump take the oath of office (scroll down), or you can watch one of his biggest critics do her thing.
"I Got You Babe" gets a killer update from James Corden and Cher.