White, 89, is both the most popular and most trusted celebrity with Americans and the person most likely to drive up the business of a brand she might choose to endorse, according to a poll released on Wednesday.

Actress Betty White poses for a photograph in Los Angeles, California
Actress Betty White poses for a photograph in Los Angeles, California May 26, 2010. Reuters
U.S. actor Denzel Washington takes part in the German game show quotWetten Dassquot Bet it... in Hanover
U.S. actor Denzel Washington takes part in the German game show "Wetten Dass" (Bet it...?) in Hanover, November 6, 2010. Reuters
Actress Sandra Bullock arrives at the 2011 Vanity Fair Oscar party in West Hollywood, California
Actress Sandra Bullock arrives at the 2011 Vanity Fair Oscar party in West Hollywood, California February 27, 2011. Reuters
Director Clint Eastwood is interviewed as he arrives at the Museum of Tolerance International Film Festival gala awards presentation in his honor in Los Angeles
Director Clint Eastwood is interviewed as he arrives at the Museum of Tolerance International Film Festival gala awards presentation in his honor in Los Angeles November 14, 2010. Reuters
Actor Tom Hanks
Actor Tom Hanks arrives to take part in the reading of "The Merry Wives of Windsor" for the 21st Annual Simply Shakespeare Fundraiser at UCLA's Royce Hall in Los Angeles May 9, 2011. The proceeds benefit the programs of the SCLA (The Shakespeare Center of Los Angeles) Reuters
U.S. actor Harrison Ford
U.S. actor Harrison Ford poses for photographs as he arrives for the British premiere of "Cowboys and Aliens" at the O2 Arena in London August 11, 2011. Reuters
Actor Morgan Freeman
Actor Morgan Freeman smiles while greeting senior citizens during an event at the Capital Area Food Bank in Washington December 18, 2007. Reuters
Catherine, Duchess of Cambridge
Catherine, Duchess of Cambridge, attends a reception to mark the Launch of Tusk Trust's US Patron's Circle in Beverly Hills, California, July 10, 2011. Reuters
Actor Will Smith
Actor Will Smith hosts the Wal-Mart Stores Inc's annual general meeting in Fayetteville, Arkansas June 3, 2011. Reuters
Johnny Depp
Cast member Johnny Depp poses as he arrives on the red carpet for the screening of the film "Pirates Of The Caribbean: On Stranger Tides" at the 64th Cannes Film Festival, May 14, 2011. Reuters