Lip-synching is generally looked down upon, but are there any performances according to yourself where for example a performer's energy outshines the apparent lack of live vocals? I'll start:
Madonna, two for you. Beyoncé? FOUR for you, Beyoncé! You go, Beyoncé. And uh... Janet Jackson. Do we have a Janet Jackson here? Here you go, one for you... And none for Britney Spears, bye.