IT was a blue day on the Oscars red carpet for Hollywood’s hottest starlets.%%Reese Witherspoon, Maggie Gyllenhaal and Emily Blunt were among the babes that plumped for this season’s sapphire styles.%%The dramatic midnight blues competed with gowns in ethereal blush colours,%%champagnes and even mint greens on the Oscars red carpet.%%While bling jewels and diamonds dazzled nearly as much as the A-listers.%% The Elizabeth Taylor award for best sparkle has to go to Naomi Watts, who wore an 85-carat triple-strand diamond necklace, 12-carat cushion cut diamond earrings and a 16-carat oval blue sapphire-and-diamond cocktail ring, all from Chopard.%%Best dressed of the evening goes jointly to Penelope Cruz and Cate Blanchett.%%Spanish siren Pen went for all-out drama in a peachy Atelier Versace gown with a feathered full skirt. She completed the look with, you’ve guessed it, Chopard diamonds.%%Cate shimmered up the red carpet in a silver crystal-mesh Giorgio Armani Prive gown, topped with a tulle beaded floral overlay.%%Brit winner Dame Helen Mirren chose a regal champagne scoop-necked frock by Christian Lacroix. The 61-year-old Best Actress called it her ‘dream dress’ topped off with yet more bling from Chopard, a 62-carat diamond brooch.%%Fellow best actress nominee Kate Winslet, wore a Grecian-influenced single-shouldered Valentino mint green gown and chunky diamond earrings.%%Cameron Diaz also picked Valentino for her fabulous white gown, topped off with $2.9m of Cartier jewellery.%%But it wasn’t all understated colours and whopping sparklers. Standing out from the crowd were Nicole Kidman in a bright red Balenciaga halter gown with an oversized bow, and Jessica Biel who accentuated her assets in hot pink Oscar De La Renta.