gift cards, perfume, nail polish, magasines, books, a picture frame with pictures of you and your friends/family in it, furniture for your room, pants, bra's, an anklet, tickets for a concert, little fairy lights to put around your room, yankee candles, bath products
Maybe electronics or a cute pair of pants. Look in etsy.com and there is some really cute pieces of jewelry for girls and guys.
A mirror, and across the frame should read: Be Bright. Be Happy. Be You.