Dave Grohl drags Taylor Swift on stage in London

i mean, he's getting from it what he wanted,, attention.

But didn't he go a TV back in the day with Nirvana and do a recorded show? I know he was againt it, but he did it (even though he half assed it on purpose to prove a point). he could have refused, but he didn't.. I know Kurt refused to LipSync, but allowed the recording of the band?
TIL "LipSync" is capitalized.