During the summer of 2008, the Jonas Brothers started their North American tour, the Burning Up Tour, promoting A Little Bit Longer and Camp Rock Soundtrack, and performing songs from previous albums as well: It's About Time and Jonas Brothers. The tour kicked off July 4, 2008, at Molson Amphitheatre in Toronto, Ontario. A Disney Digital 3D production crew filmed the two shows in Anaheim, California on July 13 and July 14 with Taylor Swift, who sang a few singles from her self-titled album, Taylor Swift, for a theatrical movie that was released in theatres as a 3D concert film on February 22, 2009. On July 14, Nick Jonas announced onstage that the band had already written five songs for their fourth studio album (third with Hollywood Records). The Jonas Brothers began to talk about their fourth studio album in the beginning of 2009. They said on several occasions that they have been working on writing and recording songs since their Burnin' Up tour in mid-2008. On March 11, 2009, the Jonas Brothers announced that their fourth studio album will be released on June 15, 2009. The band also announced that they will be embarking on a world tour in mid-2009.