Alright I have my own two cents to add to this.
I was impressed that they decided to honor Glenn and that he was there for it. It was painful last year watching him in an interview and realizing how much he has already lost. To see he was able to get through the song and that people still remember him fondly was a nice touch.
The Beach Boys - Who doesn't like seeing and hearing those songs. Just figured if they were going to do a tribute to them I was halfway expecting Wilson Phillips to be there. (Sorry, can't help it.) However I did enjoy that whole section.
Whitney was 6 years older than I am. I'm sorry that was too young to die for any reason, although many suspect it is tied in one way or another to either present or past drug use. I think Jennifer Hudson did a beautiful job. I'm sure Whitney would have enjoyed it.
Tony Bennet is now the oldest Grammy Winner. I find it funny how both Frank Sinatra and Tony Bennet both did Duet albums with some of the newest and biggest and helped to reach new audiences. However, Tony I find is more cagey and seems to bring out something special in the artists he has chosen to work with.
Adele - To say that I am happy that her voice has been saved is understatement. That was her first performance since the throat surgery and I still find her incredible to listen to. I've heard people say she can't sing and isn't talented but everyone seems to be redoing her first two albums over. She reminds me of Lulu and others of the time period. There is no airs about her, she is just a powerhouse who doesn't need a bunch of instruments and mixes to sound good. Give her a piano player and mic, then turn her loose.
Anyway that is my two cents.
PS - Sir Paul just continues to surprise me with his ability. While he has always had his background in the Beatles to fall back on, he built Wings, then his solo career, and still continues on to make new and exciting music that has other artists waiting to work him. I can't wait to see what he and Elton John have planned musically for Queen Elizabeth's Diamond Jubilee this year. That show should rock.