Lucky Number is the fourth studio album by Taiwanese singer Jolin Tsai, released on July 7, 2001, by Universal and D Sound.

[5] On June 19, 2001, it was announced that Tsai would perform the Mandarin version of the theme song "Where the Dream Takes You" for the Disney animated film Atlantis: The Lost Empire.

[10] The lead single, "If You Don't Want", is a melancholic ballad that portrays Tsai as sincere, persistent, and forgiving, offering a glimpse into her more authentic emotional world.

The photo books were produced with a budget of NT$1.5 million, featuring over 3,000 photographs taken in ten different everyday settings, including a pool, library, record store, supermarket, campus, and stage.

[24] On July 29, 2001, Tsai performed "Take It Easy" at the closing ceremony of the 30 Hour Famine event organized by Formosa TV.

[25] On October 10, 2001, Tsai took part in the National Day Concert organized by CTS, where she performed "Take It Easy" and "Can't Speak Clearly".

Tsai Chu-Chen clarified that his intention was to resolve contract-related issues with D Sound, emphasizing that they had no immediate plans to take legal action.

In response, D Sound's head, Tso Ke-hui, sent a legal complaint letter to Tsai's side, alleging defamation and accusing them of spreading false information.

[31] In response, D Sound and their lawyer, Chang An-chi, held their own press conference, declaring that Tsai's unilateral termination of the contract constituted a breach, and they demanded a public apology and compensation for damages amounting to NT$10 million.

[34] Sam Chen issued a statement asserting that the agreement was a non-binding letter of intent and emphasized that Warner would not cooperate with Tsai moving forward.

[36] In early November 2001, Tsai signed a contract with Angie Chai's company, Comic Ritz, prompting D Sound to file a formal criminal complaint against her.

[39] On June 4, 2002, the Chinese Arbitration Association Taipei ruled that Tsai's early termination of her seven-year contract with D Sound, after only two years, required her to pay NT$9 million in damages.

[40] D Sound responded by stating that the arbitration ruling vindicated them, disproving the accusations of breach of trust, embezzlement, and unclear financial records made by Tsai and her family.

However, the company maintained its criminal complaint regarding Tsai's violation of recording copyrights, which they argued was crucial for protecting their intellectual property rights.

Tsai Chu-Chen responded, stating that the arbitration ruling confirmed his right to terminate the contract, implying that D Sound had indeed committed breach of trust and underpaid her.

[41] Tencent Entertainment's Shu Wa commented: "Lucky Number is widely regarded as one of the most impressive works of Jolin Tsai's career during her time with Universal.

As Jolin Tsai's final album with Universal, its production quality is on par with her previous works, such as Show Your Love, maintaining a high standard of musical cohesiveness.

By this point, Jolin Tsai's fast-paced songs had become a defining feature of her style, solidifying her departure from her earlier 'girl-next-door' image while still retaining elements of it.