<P> In May 2006, Panic! at the Disco announced that original bassist Brent Wilson had left the band, "posting a statement that was both diplomatic and entirely inscrutable (...) yet (failing) to mention any reason why Wilson is leaving Panic," according to MTV News . In June, Wilson asserted to MTV News that he was kicked out of the band via a phone call . "It was done as a phone call and the only person who spoke was Spencer . Apparently, Brendon and Ryan were on the speakerphone too, but they didn't say a word . They never even said they were sorry," explained Wilson . Smith wrote a lengthy e-mail back to James Montgomery of MTV News, stating, in part, "We made the decision based on Brent's lack of responsibility and the fact that he wasn't progressing musically with the band," and revealed that Wilson did not write nor play any bass present on Fever: Instead, Urie recorded these parts . Wilson demanded a cut in royalties, and threatened to take his former band to court . </P> <P> In 2006, the band supported The Academy Is...on the band's worldwide tour "Ambitious Ones and Smoking Guns" from January to May . Beginning in June, the group headlined its first unnamed national tour, that would last until August . During the group's performance at the 2006 Reading Festival in August, the band was greeted by excessive bottling, one of which hit Urie in the face that knocked him unconscious . Despite this, the band continued with its set after Urie recovered . The band's second headlining tour, dubbed the Nothing Rhymes with Circus Tour, began in November . In roughly one year, Panic! at the Disco went from being the opening act on a five - band bill to the headliners on a massive arena tour . </P> <P> The Nothing Rhymes with Circus Tour feature the band's first highly theatrical live shows, which featured every song with dance numbers, skits, and tricks performed by a six - member troupe, as the band donned intricate costumes, loosely re-enacting moments from the songs . Kelefa Sanneh of The New York Times noted the sudden success and circus - inspired tour of the young band in a concert review: "There's something charming about watching a band trying to navigate sudden success, aided by a contortionist, a ribbon dancer and all the rest of it ." MTV News favorably likened its theme and wardrobe to "Janet Jackson's audience - dividing, hypersexual The Velvet Rope Tour ." The group, fresh off the major success of A Fever You Can't Sweat Out, took a break after non-stop touring, and the group members began formulating ideas for their next album together during the winter of 2006 . </P> <P> After a short period of development regarding the ideas of the album, on March 6, 2007 the band arrived at a cabin in the rural mountains of Mount Charleston, Nevada and began the writing process for the new album . After recording the new tracks and performing them live over the summer, the band returned to its native Las Vegas as well as the group's old rehearsal studio, where the band members wrote their debut record . The band grew uninterested in the songs previously written and by August scrapped the entire new album (which Ross later revealed was "three - quarters" done) and started over . "We wanted to approach these songs in the most basic form," Ross said . "We wrote them all on one acoustic guitar and with someone singing . I think that we kind of skipped that part of songwriting on the first record, and this time we're sort of paying attention to that . (...) We've written a bunch of songs since we've been home (Las Vegas). I think it's the most fun and the happiest we've been since we started ." With simplicity the new focus and the old album shelved, the group settled in and began recording what would become Pretty . Odd . In October, the band entered the Studio at the Palms at the Palms Casino Resort in Las Vegas to begin recording the album . </P>

When did panic at the disco release their first song