Glee: The Music, Volume 6 is the eighth soundtrack album by the cast of the American musical television series Glee, released on May 23, 2011 through the Twentieth Century Fox Film Corporation and Columbia Records. The album serves as the sixth and final release for the series' second season, and contains three original tracks including "Light Up the World", which was co-written by Swedish songwriter Max Martin. All of its eighteen tracks have been released as singles, available for digital download. 　　Andrew Leahey of Allmusic gave the album a rating of three-and-a-half stars out of a possible five, and wrote that it "plays up the show's creative side". He cited "I Feel Pretty / Unpretty" as being "one of the show’s prettiest tributes to self-acceptance", and also commends the Chenoweth and Matthew Morrison cover of Fleetwood Mac's "Dreams". Leahey noted that "the second half of the album doesn’t fare as well as the first", but added that the album was better "than some of its predecessors". He criticized the inclusion of a "lackluster version of 'Dancing Queen'" when there were "better songs that didn’t make the cut". 　　Many of the songs on the album were reviewed positively when they appeared on the show. Meghan Brown of The Atlantic wrote that "As If We Never Said Goodbye" sung by Chris Colfer was "absolutely stunning in every conceivable way". John Kubicek of BuddyTV called "Rolling in the Deep" as sung by Groff and Lea Michele "one of the best vocal performances this show has ever seen". Erica Futterman of Rolling Stone called the performance a "passion-filled winner", though she detected "some oversinging". Other songs were not as well received, including Paltrow's rendition of Adele's "Turning Tables". Futterman said the vocals "lacked the texture that made Adele's version so heartbreaking", and MTV's Aly Semigran wrote that while Paltrow is "a nice enough singer," she "in no way has the chops" the song requires. 　　Glee: The Music, Volume 6 debuted at number four on the US Billboard 200 and number one on Billboard's Soundtracks chart, selling 80,000 copies in its first week, giving it the second-lowest opening sales figure for a Glee release after the 48,000 copies sold by extended play Glee: The Music, The Rocky Horror Glee Show. It sold 25,000 copies in its second week, and stayed at the top of the soundtracks chart for three consecutive weeks.