Pretty. Odd. (stylized as Welcome to the Sound of Pretty Odd) is the second studio album by American pop rock band Panic at the Disco. Recorded at the Studio at the Palms in Paradise, Nevada with additional production at Abbey Road Studios in London with producer Rob Mathes, the album was released March 21, 2008 on Decaydance and Fueled by Ramen. Inspired by baroque pop and the works of The Beatles and The Beach Boys, the psychedelic-styled rock album differs greatly from the techno-influenced pop punk of A Fever You Can't Sweat Out (2005).
To begin work on the record, Panic at the Disco retreated to a cabin in the rural mountains of Mount Charleston, in the group's native state of Nevada. Upon growing dissatisfied with their final product, the band scrapped the entire album and spent time writing and recording Pretty. Odd. throughout the following winter. Production came together quickly and each song made the cut. Additional recording, such as strings and horns were produced at Abbey Road Studios. It is the only album to feature bassist Jon Walker, and last to feature vocalist and lead guitarist Ryan Ross as both left the band in 2009, a year later after the album's release.
The record received a generally positive critical response and under-performed commercially in the aftermath of its double-platinum-selling predecessor. The album spent 18 weeks on the Billboard 200 and the album's lead single "Nine in the Afternoon" was certified double platinum by the RIAA. The album has since gathered a cult following and has sold 422,000 copies by 2011. In 2019, the album was certified platinum by the RIAA.