School level, according to a method developed with neuroscience specialists to maximize the retention of information over the long term. Anggun recorded a song to learn about the "Philosophy" subject. Anggun was chosen to be the brand ambassador for a herbal drinking brand Acaraki Golden Sparkling. Artistry and legacy Anggun possesses a three-octave contralto voice, which has been described as "husky", "soulful", and "distinctive" by music critics. Chuck Taylor from Billboard commented: "Vocally, Anggun is a fortress of power, easing from a delicate whisper into a brand of cloud-parting fortitude commonly associated with grade-A divas." John Everson from The SouthtownStar noted that "Anggun is gifted with a warm, full voice that can tackle slight pop songs without overpowering them as well as swoop with depth and ease over heavier emotional numbers." Anggun received her first songwriting credit at the age of twelve on her debut album Dunia Aku Punya (1986). Anggun said, "I was writing songs all the time, but my specialty was classical piano and singing." Anggun started as a rock singer in Indonesia, and was influenced by rock bands such as Guns N' Roses, Bon Jovi, and Megadeth. She was a big fan of Metallica. After her initial international success, she showed her versatility by changing her musical style for each album. Her later influences cover a wide range of styles from jazz to pop, extending from Joni Mitchell to Madonna. She told VOGUE Italia that she listened to wide range of artists from The Beatles to David Bowie, Billie Holiday to Leonard Cohen, up to Dave Grohl, P!nk and Bruno Mars. Anggun identified Nine Inch Nails's The Fragile (1999) as "the album that changed my life" and the band's frontman Trent Reznor as "the man of my musical life." Her other musical influences include Tracy Chapman, Sheila Chandra and Sting. Anggun, who studied Balinese dance since childhood, uses the traditional art in her performances. Anggun's image has been compared to that of Pocahontas. Some international articles and magazines give a nickname for Anggun as "Indonesian Madonna (Madonna Indonésienne)" or even "Madonna from Asia (Madonna de l'Asie)". At the early stage of her career as a rock singer, Anggun was known for her tomboy look—wearing a crooked beret, shorts, studded jacket, and large belt; this set a trend during the early 1990s. Later, she has focused on her femininity and sexuality, emphasising her long black hair and brown