"I'm sorry he was upset," he told THR. "I was really thrilled that we were finally getting him on the GRAMMYs. The final jam started with Arcade Fire a few years ago, and LL Cool J last year.

"I want to end on a high, an up note. I did tell them we'd take it as long as we could. The number was about five, six minutes long, and we got to within a minute twenty of the end. We got as close as we could possibly get."