Though she's been a married woman for nearly a year now, Beyonce is still doing her part to stick up for all the single ladies. At last night's Grammy Awards, Mrs. Jay-Z was responsible for our favorite cover in a show full of them. After singing the first few verses of her hit "If I Were A Boy," she segued into Alanis Morissette's, "You Oughta Know," inserting some 90s-style indignance into her mostly forgiving, if somewhat melancholy, ballad.