I know a member of a long standing UK popular boy/girl band. She was doing 88 shows for me. Lots of extra instruments on track to suppliment the 6 piece band. She was concerned she would get a coold and have trouble singing, so we got together with my sound guy and recorded her live vocal next show. Sure enough, a few shows later she was croaky - so we quietly switched to the track. Her miming was so good, even her throat wobbled at the right moments - something Gerry's doesn't do. She told me that although often in her band they all had headset mics, there were no packs, just the IEM pack for her ears. She has a lovely voice, but they couldn't sing and dance at the same time - far too much lack of puff and deep breathing. If you mime well, that's a great skill.
British rock band Status Quo came out with a really silly song, lost their bass player, got asked to play it on BBC Top of the Pops, which at that time required everyone to mime. The song was not remotely typical of them, so they did it and had a laugh. They borrowed a bass player from British band Slade, and at the end the rhythm guitarist knocks the drums and drummer over. The mics are Beyer 201 dynamics, with a bit of wire in the mic socket, pretending to be antennas! Rather than mime badly, they just deliberately messed up the entire thing that went out live!