I too watched here and there, kept expecting the show to be over, but it kept going!
I found the performance of the older lady and Kid Rock kind of cool.

(She had performed on the first Grammy show, 50 years ago.)
Having caught her performance, to me Winehouse's Musical delivery and her personal style are, without a doubt, unique. Hopefully she can overcome what ever demons (crack/heroin) she is battling. I switched back in time to see Herbie win.
I also like the Foo Fighters, but of all their live performances I've ever caught, that wasn't their finest vocal. If that is the way that Tune is meant to be sung, or I should say YELLED without purpose, ew.