CAGUILERAHALLO103107_01.jpgChristina Aguilera CAGUILERAHALL103107_002.jpgUsually, trick-or-treaters just want candy - but when you're a celeb the size of Christina Aguilera, some of them want autographs too! The Dirrty diva was making her way home from Hyde's Halloween blowout (and may we just say WOW at her spectacular costume!) last night when she and husband Jordan Bratman ran into one of Xtina's superfans, who started pleading for the singer's John Hancock. At first, it didn't look like Christina was going to give it up - but after seeing how crushed the guy looked, she took pity and gave out her signature. Good goin', girl - there's nothing we love to see more than celebs giving back to their fans!