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The Postal Service is officially "closed for business."  Frontman Ben Gibbard tweeted the announcement on Monday following the band's final performance earlier that morning at Chicago's Metro. 

According to "Rolling Stone," he and bandmates Jimmy Tamborello, Jenny Lewis, and Laura Burhenn wrapped up their Lollapalooza after-show around 1:30 a.m. with a second rendition of their hit "Such Great Heights." 

Gibbard told the crowd that it would be the last song of this year's reunion tour and "the last song [they] will ever do."  He also thanked all the fans for coming out to "celebrate" before walking off stage with a final "that's it." 

The Postal Service got back together earlier this year to embark on a tour behind the tenth anniversary deluxe reissue of their 2003 debut album, Give Up.  The extended edition also included their first new song in a decade, "A Tattered Line of String." 

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