On January 22, 2010, JYP announced that Sunmi would be postponing her musical career to pursue an academic career and that Hyerim, a JYP trainee, would take her place. Sunmi continued to work as a participating member of the Wonder Girls in through February in order to complete scheduled events. Sunmi's departure put many of group's American plans into disarray. The Wonder Girls had been preparing an English album, with six tracks to consist of English versions of Korean singles and the other half of brand new material, initially scheduled for release in February 2010. They were also planning to have a headlining tour in January 2010; however, due to the departure of Sunmi, plans for the tour were delayed and the album was eventually scrapped.