eight weeks and was certified two times platinum by the Bundesverband Musikindustrie (BVMI) for shipment of one million copies. Similarly, in Italy the album debuted at number one maintaining that position for 20 weeks, of which 15 were consecutive. True Blue became the best-selling album by an international artist with sales of over 1.5 million copies. Across Europe, True Blue achieved platinum status in Finland, gold in Sweden, Ireland, Greece and Portugal and silver in Denmark. According to biographer Christopher Anderson, where it failed to reach the top of the charts, the album nevertheless went gold. Impact and legacy Stephen Thomas Erlewine noted that "True Blue is the album where Madonna truly became 'Madonna the Superstar'—the endlessly ambitious, fearlessly provocative entertainer that knew how to outrage, spark debates, get good reviews—and make good music while she's at it." Mark Savage from BBC stated that True Blue is the album which cemented Madonna's reputation as the 'First Lady of Pop'. Sal Cinquemani from Slant Magazine said that with the album "Madonna made the transition from pop tart to consummate artist, joining the ranks of '80s icons like Michael Jackson and Prince." Similarly, Robert C. Sickels, the author of 100 Entertainers Who Changed America: An Encyclopedia of Pop Culture Luminaries, wrote that the album "cemented Madonna's place as the most popular female musical star of the 1980s, shining alongside male pop icons like Prince and Michael Jackson." NME dubbed the three as a "holy trinity" of pop music of the decade. Regarding Madonna's influence on the record industry and younger artists, Debbie Gibson's then manager Doug Breitbart commented: "Madonna has brought back a really strong, melodic component to pop music. She has a very youth-oriented, up, bubbly, fun sound." Slant Magazine listed the album at number 60 on their list of "The 100 Best Albums of the 1980s" and stated that "True Blue was the album on which it became readily apparent that Madonna was more than just a flash-in-the-pan pop star." They added, "It's when she began manipulating her image—and her audience—with a real sense of clarity and purpose and made sure she had quality songs to back up her calculation and world-dominating ambition." The global success of True Blue marked the first time Madonna entering the Guinness Book of World Records in its 1988 edition, where she was dubbed as the most successful singer for 1986. The album also held