Earlier this week, Britney Spears moaned, “A lot of people think that I don’t sing live. Because I’m dancing so much I do have a little bit of playback, but there’s a mixture of my voice and the playback. It really pisses me off because I am busting my ass out there and singing at the same time and nobody ever really gives me credit for it.” Yesterday, Jezebel ran a long-form cultural history of lip-syncing that necessarily included an examination of Brit’s miming throughout her career. She does it, she does it a lot, and there’s ample evidence out there.