By StyleWatch
Updated June 10, 2010 10:00 AM

Jason DeCrow/NBC; Katie B/EaglePress; Dimitrios Kambouris/WireImage

It’s no secret that Jessica Biel has completely transformed herself from laid-back tomboy to high-fashion glamazon, but the actress proved her style cred on Tuesday in N.Y.C., pulling off three different outfits with one thing in common: Oscar de la Renta. Kicking off a day of press to promote her new film, The A-Team, an Oscar-clad Jessica showed up for an interview on the Today show wearing an ivory crepe-de-chine blouse, boucle tweed jacket and pleated cropped palazzo pants–all from the celebrated designer. Later that afternoon, looking every bit the uptown girl, she paired the same Oscar de la Renta pants with the designer’s powder-blue ruffled blouse and navy cardigan. And before calling it a night, the actress leaned on Oscar once more, stepping out at a launch party for stylist Mark Townsend’s new online beauty mag, rocking an emerald silk taffeta ruffled blouse and a lapis-colored tweed embroidered skirt from de la Renta with a pair of black peep-toe pumps and bold Tiffany & Co earrings. With so many stellar looks in a single day, it’s tough to decide which one’s the most elegant! Tell us: Which of Jessica Biel’s Oscar outfits do you like best? David Yi