On April 5, 2010, the Wonder Girls announced a 20-show tour of the US and Canada, dubbed "The Wonder World Tour", which included fellow label mates 2PM for nine dates in conjunction with Live Nation. The tour consisted of a combination of the English and Korean versions of their hits, covers of popular English-language songs, and new songs from their then-upcoming album. The first leg of the tour began in Washington, D.C. on June 4, 2010. The tour was eventually extended to add an additional leg in which label mates, 2AM, would open for the group during certain dates.