Conversation so far:
What happened regarding Utada Hikaru in 2004?
In 2004 Utada Hikaru released her first singles compilation album Utada Hikaru Single Collection Vol. 1 and her North American English-language debut album, Exodus.
was the Utada Hikaru album Exodus successful?
Exodus is the largest debut selling foreign language album in Japanese history (debut with 523,761 units).

Question: when did she go international?
Self-contained rewrite: when did Utada Hikaru go international?