Performers Who Were Caught Lip Syncing On Live TV

What happens when a live performance turns out to be not so live? While there's a certain expectation that performers who do live shows would actually, you know, do the show in full, there's a long and storied history of people lip syncing their hits on stage. Sometimes, it's expected, and others, the whole thing just blows up in their face. After all, are you paying to see someone sing, or are you paying just to see someone mime a performance?