What was Grammy's biggest surprise?

Last night’s Grammy ceremony was full of surprising twists that enlivened the performances and had a major impact on the awards. Esperanza Spalding won for Best New Artist, upsetting box-office superstar Justin Bieber, Drake and Mumford and Sons. Arcade Fire lost to the Black Keys for Best Alternative Music Album, but then rebounded to edge Eminem for Album of the Year. Shady, who had been nominated for 10 awards, had to settle for only two trophies, for Rap Album and Rap Solo Performance. (Maybe that’s why he dropped that F-bomb during “Love the Way You Lie.”) And then there was Lady Gaga arriving in an egg, and then sporting a set of horns; Christina Aguilera nearly tumbled; and Cee-Lo’s outfit was a feathery rainbow connection. So many twists and shockers, but what would you say was the biggest?