As much as I love Beyonce, Hometown Glory should have won Best Pop Solo Performance in 2010.
And Leona was completely snubbed from a BNA nomination in 2009.
Also so many classic albums have lost out to AOTY to albums no one even remembers. (Purple Rain, Born in the U.S.A., The Wall, Back to Black, American Idiot, The Marshall Mathers LP, Kid A, OK Computer, etc, etc).