Sexy hip-shaker CHRISTINA AGUILERA showed she knows how to keep a marriage spicy when she slipped into the Vancouver lingerie/novelty boutique Honey and purchased: Chocaholics Body Frosting, complete with a brush to apply the groovy goo; a set of fur-covered handcuffs; one Miss Zorro costume - and a Frisky French Maid outfit! But when a salesgirl suggested their super-popular Naughty Nurse costume, Christina giggled and confessed: "I already have that one - and my husband has the doctor outfit and instrument bag!"