I've been following The Mac/Stevie for more than 20 years now, and I've only seen one lip-synch. It was some weird Japanese TV show promoting Behind The Mask. Stevie lip-synched "Freedom", and Christine lip-synched "Save Me" (I think - could've been "Skies The Limit" - the tape wore out years ago...). And it was the freakiest thing I've ever seen from any of them. It was obvious that it was something they weren't used to doing and something they were hardly comfortable with.
But I don't think any of the members have ever lip-synched in concert, for paying fans. Enhanced with samples? Sure. But the Say You Will show that I saw in Houston was one of the best-sounding concerts I've ever attended, so I'll give them their 29-piece backup band and minor computer enhancements.
