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What a pair. Jess and Justin glowed at the 2009 Met Ball, with the former in a cherry asymmetrical-skirted gown from Atelier Versace and the later in a dapper tux and his now-signature specs. Think he might wear those frames on his wedding day, too?

Jessica sure loves a good princess gown. At the premiere for her flick Valentine's Day, the actress chose a one-shouldered Oscar de la Renta in shades of pink (how appropriate). Reworked in white, this is one dress we'd love to wear down the aisle ourselves.

Is that...denim? Well, almost. At the 2010 SAG Awards, J.T. picked a sleek tuxedo, black bow tie and deep blue shirt, all by Dolce & Gabbana. We love how the button-up complements the singer's famous azure eyes. Maybe that could be his "something blue?"

Jessica's ivory Prada column at the 2009 Oscars received mixed reviews from fans. Still, there's no denying the shade and shape have got major wedding potential.

In this William Rast tux and crisp white tie at the 2009 Emmys, Justin picked up an award for his hilarious work on SNL.

At the 2007 Vanity Fair Oscars Party, Biel went the minimalist route in this pink gown by Oscar de la Renta. Thanks to the star's amazing physique, she can go without the usual black-tie bells and whistles...so we'd love to see her choose a more streamlined, less fussy wedding dress.

We're definitely digging this gray William Rast blazer J.T. selected for Condé Nast's Fashion Rocks party back in 2009. There's just something about a piped lapel and pocket square. We're not totally sold on that cropped necktie, however...

Could Jessica go the Roaring Twenties route with a flapper frock? In metallic-beaded Atelier Versace at the 2011 Vanity Fair Oscar Party, she certainly made a case for Jazz Age dressing.

On that same night, Timberlake brought sexy back in head-to-toe Tom Ford. Perfection.

At a 2009 screening for her film Easy Virtue, Jess wore a super-sophisticated one-shoulder column by 3.1 Phillip Lim. We could definitely see that ruffled detail and shoulder-baring silhouette translating into a pretty wedding look.

Fellow well-dressed music mogul Kanye certainly seems to approve of Justin's style sense.

Don't get too hung up on this vibrant Diane von Furstenberg's color palette and print. Those might not be nuptials-appropriate, but the airy chiffon sleeves and asymmetrically-draped skirt sure are.

The singer/designer took a bow after his Spring 2009 William Rast show in a black shirt and pocket square, faded denim and a camel-colored blazer-and-vest combo. While the overall ensemble's too casual for a trip down the aisle, the jacket's neutral shade could translate nicely into a summertime three-piece suit perfect for an outdoor wedding.

The dashing couple already looked wedding-ready at the 2010 Met Ball. Jess wore a Ralph Lauren Collection gown, while Justin picked yet another William Rast tux.