1019 is the debut studio album by Taiwanese singer Jolin Tsai (Chinese: 蔡依林). It was released on September 10, 1999, by Universal Music Taiwan. Tsai emerged champion at an MTV singing competition at the age of 18, and it kickstarted her singing career and paved the way to her journey in becoming a teen idol. In March 1999, she signed a recording deal with Universal. After she signed with the label, Tsai's debut single, "Living with the World", was released in July 1999. The single was a big success, and led to the release of her debut album, which has sold more than 400,000 copies in Taiwan alone. Referred to as the "Teenage Boy Killer", Tsai became an instant hit among teenagers in Taiwan. The lead single, "I Know You're Feeling Blue", reached number 30 on the Hit FM Annual Top 100 Singles.

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