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One of the most notable aspects of this brand is the advertising campaign, begun in 1956, which utilized twins as spokespersons for the gum, as a play on the word "double" in the name. The original "Doublemint Twins" were Jayne and Joan Boyd of Hammond, Indiana, who appeared in advertisements for Doublemint until Joan became pregnant in 1963. The company, however, continued sporadically to promote the campaign, which included twins Jennie and Terrie Frankel in the late 1960s; later "Doublemint Twins" included June and Patricia Mackrell through the 1970s (who had also been the Toni Twins for Toni Home Permanent, which used the slogan "Which twin has the Toni?"), Patricia and Cybil (some sources show her name as Priscilla) Barnstable, Denise and Dian Gallup, Cynthia and Brittany Daniel (future co-stars as the Wakefield twins in the TV series based on the Sweet Valley High novels), Tia and Tamera Mowry (future co-star of The Game with both Tia Mowry and Brittany Daniel and future co-stars of Sister, Sister), Heidi and Alissa Kramer, figure skaters Pamela and Jeremy Green, and Jean (née Barbara) and Elizabeth Sagal (daughters of TV director Boris Sagal and sisters of Married...With Children's Katey Sagal). The Sagal twins enjoyed a brief run as the stars of a sitcom, Double Trouble, in 1984. Later twins projected more sex appeal in keeping with trends in American advertising; the Barnstable twins were later asked to pose for Playboy due to their popularity as spokeswomen for the gum. In 1987, Denise and Dian Gallup spoofed their roles as the Doublemint Twins in cameo roles in the Mel Brooks film, Spaceballs.
In 2004, the European Union Court of Justice ultimately denied Wrigley's request for trademark status on the name "Doublemint"; the Court found that the mark DOUBLEMINT was descriptive of the product and in violation of trademark law.
The actual flavorings used in Doublemint gum are a trade secret, but the company does say that the main flavor ingredient is peppermint. Although it is not a sugarless gum, Wrigley's replaced some of the sugar with aspartame and acesulfame potassium, both artificial sweeteners, in 2003.
Wrigley began running Doublemint Twin commercials again in 2005 with a new set of twins, Natalie and Nicole Garza, who were dressed in old-fashioned clothes. They drove a tandem bike through various modern day situations, singing about the complexity of modern life and touting the joy of the simple pleasure of Doublemint gum.
Wrigley also began an open casting call for people to be in their ad campaigns. The call goes out to not only actual twins but also, literally, anyone and their dog. Many twins have applied, but so have people and their friends, their pets, even inanimate objects. These can be seen at the official Doublemint Gum website. Since then, the Wrigley Company has run various commercials with some of the new twins, as well as Natalie and Nicole from the 2005 campaign.
R&B singer Chris Brown performed a modified version of "Forever" in a 2008 commercial for Doublemint, which introduced a thinner Plen-T-Pack package. Wrigley terminated their endorsement deal with Brown on February 9, 2009 due to his arrest for domestic violence against Rihanna.