This tour was documented in the M.net reality show Welcome to Wonderland. Following the tour, the Wonder Girls debuted a music video for "Now", a cover of the Fin.K.L single. In March 2009, the Wonder Girls confirmed that the group would launch in an English-language music career in the United States with the official release of an English version of "Nobody" in summer 2009. It was later announced that the release would be followed by an English version of "Tell Me", and that an English album would be forthcoming. In June 2009, JYP Entertainment announced that the Wonder Girls would be joining the Jonas Brothers on the North American leg of the Jonas Brothers World Tour 2009. In order to concentrate on their American debut, both Sohee and Sunmi had dropped out of high school.Han, Sang-hee. "Two Members of Wonder Girls Quit School for US Debut" . The Korea Times. June 15, 2009. Retrieved June 18, 2009. The English version of "Nobody" was released on June 26, 2009, the day before the start of their tour with the Jonas Brothers. The Wonder Girls were initially signed on for 13 concert dates across the US, but they were eventually given the opportunity to join the Jonas Brothers for a total of 45 concert dates. "Nobody" entered the Billboard Hot 100 in October 2009, making them the first Korean group to enter the chart. The song also topped the Taiwan and Hong Kong music charts. 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. 선미, 원더걸스 탈퇴 왜? "Why Did Sunmi eave Wonder Girls?'". JoongAng Ilbo. January 23, 2010. Retrieved January 22, 2010. 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 the 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. On April 5, 2010, the Wonder Girls announced a 20-show tour