Mobile Orchestra is the fifth studio album by American electronica project Owl City, which was released on July 10, 2015. The album debuted at number 11 on the Billboard 200. This is the project's last album under Republic Records before releasing subsequent albums independently. Adam Young collaborated with several artists to provide additional vocals for the other songs on the album: English artist Sarah Russell for the track "Thunderstruck", country musician Jake Owen for the country pop song "Back Home", Avicii's "Wake Me Up!" vocalist Aloe Blacc for the graduation-themed song "Verge", and pop rock band Hanson for the song "Unbelievable". In 2014, Owl City released an EP called Ultraviolet and released "Beautiful Times" as the lead single. Following the release, Young stated his intent to release a steady "series of EPs" in 2014 rather than one larger recording. On October 7, 2014, Young released two new songs simultaneously, "You're Not Alone" (featuring Britt Nicole) and "Tokyo" (featuring Sekai no Owari). The former would eventually become part of the international edition of the album while the latter would become the fourth track of the Japanese edition. The song "Up All Night" from the extended play Ultraviolet was included on the Japanese edition of the album as well. On April 19, 2015, Owl City made an announcement stating that a new full-length album would be released in the summer. On May 12, 2015, the album name was revealed along with its artwork, track list