Question: Tiergarten was the third single, performed by Canadian-American singer-songwriter Rufus Wainwright's, his fifth studio album was titled?
Context: Rufus Wainwright is the eponymous debut studio album by Canadian-American singer-songwriter Rufus Wainwright, released in the United States on May 19, 1998 through DreamWorks Records.  The album was produced by Jon Brion, with the exception of "In My Arms", which was produced and mixed by Pierre Marchand, and "Millbrook" and "Baby", which were produced by Brion and Van Dyke Parks.  Lenny Waronker was the album's executive producer. "I Don't Know What It Is" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright.  It was the first single from Wainwright's third studio album "Want One" and was released in a slim-line jewel case format on July 26, 2004. "Tiergarten" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright.  Released in October 2007, it was the third single from Wainwright's fifth studio album, "Release the Stars".  A limited edition (500 copies) 12" vinyl single containing "Supermayer Lost in Tiergarten" was released on October 27.  A one-track EP also containing the Supermayer remix was released in the UK through iTunes and 7digital on October 29. "Oh What a World" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright.  It was released as the second single from Wainwright's third studio album, "Want One" (2003), released digitally via iTunes and 7digital in the United Kingdom on November 8, 2004.  Promotional copies were also distributed to radio stations in an attempt to increase awareness of the song and album.  The song includes several arrangements from Maurice Ravel's Boléro. "The One You Love" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright.  It served as the first single from Wainwright's fourth studio album, "Want Two", and was released digitally in the UK on February 28, 2005.  Promotional singles distributed to radio stations contained both the album version and a radio edit. Rufus Does Judy at Carnegie Hall is the sixth album (and first live album) by the Canadian-American singer-songwriter Rufus Wainwright, released through Geffen Records in December 2007.  The album consists of live recordings from his sold-out June 14–15, 2006, tribute concerts at Carnegie Hall to the legendary American actress and singer Judy Garland.  Backed by a 36-piece orchestra conducted by Stephen Oremus, Wainwright recreated Garland's April 23, 1961, concert, often considered "the greatest night in show business history".  Garland's 1961 double album, "Judy at Carnegie Hall", a comeback performance with more than 25 American pop and jazz standards, was highly successful, initially spending 95 weeks on the "Billboard" charts and garnering five Grammy Awards (including Album of the Year, Best Album Cover, Best Solo Vocal Performance – Female and Best Engineering Contribution – Popular Recording). House of Rufus is a collection of six studio albums, two live albums (one being a double album), four additional albums of previously unreleased material, and six DVDs recorded by Canadian-American singer-songwriter Rufus Wainwright, reissued as a 19-disc box set in the United Kingdom on July 18, 2011.  Wainwright's official site claimed that the collection "spans Rufus' entire career and represents the most complete collection of Rufus Wainwright recordings to date." Release the Stars is the fifth studio album by Canadian-American singer-songwriter Rufus Wainwright, released through Geffen Records on May 15, 2007.  Pet Shop Boys' Neil Tennant was the executive producer; the album was mixed by producers Marius de Vries and Andy Bradfield.  Wainwright's most commercially successful album to date, "Release the Stars" charted in 13 countries, reaching Top 10 positions in Denmark, Norway, and the United Kingdom, and was certified gold in Canada and the UK.  The album generated three singles: "Going to a Town", which peaked at number 54 on the UK Singles Chart, "Rules and Regulations", and "Tiergarten". All Days Are Nights: Songs for Lulu is the sixth studio album by Canadian-American singer-songwriter Rufus Wainwright, first released in Canada through Decca Records on March 23, 2010.  The album was produced by Wainwright (with Pierre Marchand on three tracks), and mixed by Marchand, who produced Wainwright's second album, "Poses" (2001). "Rules and Regulations" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright.  It was the second single from Wainwright's fifth studio album, "Release the Stars", released digitally via iTunes in the UK on July 30, 2007.
Answer: Release the Stars