Adam did "If I Can't Have You" for disco night.
He didn't do it with the usual disco style, but did another of his 'standing in one spot with the lights all subdued, with funky anguish' for his style.
I love the guy. And I was glad the judges loved the performance. But I didn't love it. It's good though if it gets him through. I prefer liveliness and not anguish.