Expectant moms can take style notes from the sexy and chic Christina Aguilera. Not only is she well-dressed and comfortable, but she’s also going green! Christina’s deep-V maxi dress is part of Gypsy 05’s first “Go Green” line, made from organic fabrics, natural dyes and is produced in a solar-powered factory. How much greener can you get? Others stars who own this long and elegant dress include Lauren Conrad and Denise Richards. Get it now at ronherman.com for $100, available in a variety of colors. Top it off with this yellow Mossimo cardigan, $18 at target.com to compelete Christina’s look.