Helen Mirren poses with her Best Actress award at the 2007 BAFTA (British Academy of Film and Television Arts) awards at The Royal Opera House in London.Helen Mirren poses with her Best Actress award at the 2007 BAFTA (British Academy of Film and Television Arts) awards at The Royal Opera House in London.REUTERS/Dylan MartinezPresenter and actress Naomi Watts arrives at the 2007 Academy Awards in Hollywood, California. Watts is wearing a dress designed by Escada and jewelry by Chopard.Presenter and actress Naomi Watts arrives at the 2007 Academy Awards in Hollywood, California. Watts is wearing a dress designed by Escada and jewelry by Chopard.REUTERS/Max MorseBest actress Oscar nominee Laura Linney of the film "The Savages", wearing jewelry from Cathy Waterman, poses with actress Jennifer Garner, who stars in the best picture Oscar nominated film "Juno," as they arrive at the 2008 Academy Awards.Best actress Oscar nominee Laura Linney of the film "The Savages", wearing jewelry from Cathy Waterman, poses with actress Jennifer Garner, who stars in the best picture Oscar nominated film "Juno," as they arrive at the 2008 Academy Awards.REUTERS/Mario AnzuoniActress Keri Russell dressed in Nina Ricci and wearing jewelry from H. Stern, poses in front of actor Dennis Hopper and his wife, Victoria, as she arrives at the 2008 Academy Awards.Actress Keri Russell dressed in Nina Ricci and wearing jewelry from H. Stern, poses in front of actor Dennis Hopper and his wife, Victoria, as she arrives at the 2008 Academy Awards.REUTERS/Mario AnzuoniActress Nicole Kidman, dressed in Balenciaga and wearing a L'Wren Scott necklace, takes the stage to present the honorary Oscar to Robert Boyle during the 2008 Academy Awards.Actress Nicole Kidman, dressed in Balenciaga and wearing a L'Wren Scott necklace, takes the stage to present the honorary Oscar to Robert Boyle during the 2008 Academy Awards.REUTERS/Gary HershornActress and co-host Anne Hathaway laughs as she arrives at the 2011 Academy Awards. Hathaway's diamond necklace is by Tiffany and Co.Actress and co-host Anne Hathaway laughs as she arrives at the 2011 Academy Awards. Hathaway's diamond necklace is by Tiffany and Co.REUTERS/Mario AnzuoniAustralian actress Nicole Kidman, best actress nominee for her role in "Rabbit Hole", and her husband Keith Urban arrive at the 2011 Academy Awards. Kidman's necklace is by Fred Leighton.Australian actress Nicole Kidman, best actress nominee for her role in "Rabbit Hole", and her husband Keith Urban arrive at the 2011 Academy Awards. Kidman's necklace is by Fred Leighton.REUTERS/Lucas JacksonJennifer Lopez arrives for the 2006 Academy Awards at the Kodak Theatre in Hollywood. Her jewelry by Fred Leighton includes a 1950's diamond and 18 carat diamond necklace, valued at $25,000; a 1960's diamond and 10-carat gold bracelet valued at $85,000; 1Jennifer Lopez arrives for the 2006 Academy Awards at the Kodak Theatre in Hollywood. Her jewelry by Fred Leighton includes a 1950's diamond and 18 carat diamond necklace, valued at $25,000; a 1960's diamond and 10-carat gold bracelet valued at $85,000; 1960's diamond pendant earrings, valued at $75,000; and a rose cut diamond ring valued at $55,000.REUTERS/Lucy NicholsonCarol Brodie, a spokesperson for the House of Harry Winston, holds up a Y-shaped necklace set with round and pear-shaped diamonds, part of $73 million in jewels displayed at the House of Harry Winston in Beverly Hills. Many of the jewels will be worn by nCarol Brodie, a spokesperson for the House of Harry Winston, holds up a Y-shaped necklace set with round and pear-shaped diamonds, part of $73 million in jewels displayed at the House of Harry Winston in Beverly Hills. Many of the jewels will be worn by nominees, presenters, performers and guests at the 2001 Academy Awards.REUTERSNominee Amy Adams for best actress for her work in "Doubt" arrives at the 2009 Academy Awards. Adams is in a strapless dress designed by Carolina Herrera.Nominee Amy Adams for best actress for her work in "Doubt" arrives at the 2009 Academy Awards. Adams is in a strapless dress designed by Carolina Herrera.REUTERS/Mario AnzuoniBest supporting actress winner Penelope Cruz for "Vicky Cristina Barcelona" holds her Oscar backstage at the 2009 Academy Awards.Best supporting actress winner Penelope Cruz for "Vicky Cristina Barcelona" holds her Oscar backstage at the 2009 Academy Awards.REUTERS/Mike BlakeBest actress nominee Keira Knightley arrives at the 2006 Academy Awards. Knightley is wearing a 1960's Bulgari necklace.Best actress nominee Keira Knightley arrives at the 2006 Academy Awards. Knightley is wearing a 1960's Bulgari necklace.REUTERSActress Rachel Weisz in Vera Wang with vintage Cartier jewelry arrives at the 2007 Academy Awards. Weisz is wearing a dress designed by Vera Wang and vintage jewelry by Cartier.Actress Rachel Weisz in Vera Wang with vintage Cartier jewelry arrives at the 2007 Academy Awards. Weisz is wearing a dress designed by Vera Wang and vintage jewelry by Cartier.REUTERS/Lucy Nicholson