Question: Who is the father of the recording artist who debuted on the Best of Both Worlds tour? 

full_context: Document 1: Miley Cyrus videography: American actress, singer, and songwriter Miley Cyrus has appeared in music videos, films, and television series. From 2006 to 2011, Cyrus starred in the television series "Hannah Montana" as Miley Stewart and her alter ego, Hannah Montana. In 2009, Cyrus starred in the feature film "", whose soundtrack included her lead single "The Climb". Her other films included voicing the role of Penny in the animated film "Bolt" in 2008, "The Last Song" with Liam Hemsworth in 2010, and "LOL" with Demi Moore in 2012. Her song "When I Look at You" was part of "The Last Song" soundtrack with the music video directed by the film's producer, Adam Shankman.
Document 2: Hannah Montana: The Movie: Hannah Montana: The Movie is a 2009 American teen musical comedy-drama film based on the Disney Channel television series of the same name. It was the second theatrical film based on a Disney Channel Original Series, after "The Lizzie McGuire Movie" (2003). The film was directed by Peter Chelsom with screenplay penned by Daniel Berendsen. The film was produced by David Blocker, Billy Ray Cyrus, Alfred Gough, Miles Millar, Steven Peterman and Michael Poryes. The film stars series regulars Miley Cyrus, Billy Ray Cyrus, Emily Osment, Jason Earles, Mitchel Musso, and Moisés Arias, as well as Lucas Till, Vanessa Williams, Margo Martindale, and Melora Hardin.
Document 3: Breakout (Miley Cyrus album): Breakout is the second studio album by American recording artist Miley Cyrus, released on July 22, 2008 by Hollywood Records. It is her first record that is not affiliated with the television series "Hannah Montana", in which Cyrus portrays the title character Hannah Montana. She co-wrote eight of its thirteen tracks, several of which with the assistance of Antonina Armato and Tim James. The majority of the record was composed as she traveled during her headlining Best of Both Worlds Tour (2007–08). Overall, "Breakout" is dominant on pop rock but explores a variety of other musical genres. Lyrical themes addressed in the album relate to breakups and coming of age.
Document 4: Gonna Get This: "Gonna Get This" is a pop song by American singer-songwriter and actress Miley Cyrus, performing as Hannah Montana – the alter ego of Miley Stewart – a character she plays on the Disney Channel television series "Hannah Montana". It also features vocals from R&B singer Iyaz. It was released to Radio Disney on September 24, 2010 as promotion for the fourth season of "Hannah Montana". The song is musically dance-pop based. The song was later released on October 5, 2010 through iTunes as a promotional single from the soundtrack of the same title as the special title ("Hannah Montana Forever") of the fourth and final season of the series.
Document 5: Miley Cyrus: Miley Ray Cyrus (born Destiny Hope Cyrus; November 23, 1992) is an American singer, songwriter, and actress. After playing minor roles in the television series "Doc" and the film "Big Fish" in her childhood, she became a teen idol starring as the character Miley Stewart in the Disney Channel television series "Hannah Montana" in 2006. Her father Billy Ray Cyrus also starred in the show. She subsequently signed a recording contract with Hollywood Records, and her debut studio album "" (2007) was certified triple-platinum by the Recording Industry Association of America (RIAA) having shipped over three million units. She released her second album "Breakout" and launched her film career as a voice actress in the animated film "Bolt" in 2008.
Document 6: The Best of Both Worlds (song): "The Best of Both Worlds" is a pop rock song performed by American singer–songwriter and actress Miley Cyrus, performing as Hannah Montana – the alter ego of Miley Stewart – a character she played on the Disney Channel television series "Hannah Montana". It was released as the lead single from the "Hannah Montana" soundtrack album on March 18, 2006. "The Best of Both Worlds" is the theme song for the television series; in the series' third season, the 2009 Movie Mix is used as the theme. A live version is available on "Hannah Montana & Miley Cyrus: Best of Both Worlds Concert" (2008), a karaoke version is included in the soundtrack's karaoke series (2008), and the 2009 Movie Mix is featured on (2009). The song has elements of bubblegum pop and pop rock. Lyrically, it is a showcase of the double life lived by the series' protagonist Miley Stewart.
Document 7: Best of Both Worlds Tour: Best of Both Worlds Tour was the debut concert tour by American recording artist Miley Cyrus. The tour was held to promote the double-disc album "" (2007), which consisted of the soundtrack to "Hannah Montana"' s second season and her debut studio album. It initiated in October 2007 and concluded in March 2008, visiting cities in the United States and Canada. The tour was promoted by AEG Live and Buena Vista Concerts. Labelmates the Jonas Brothers, Aly & A.J., and Everlife each served as opening act during the tour. One dollar from each ticket sold was donated to the City of Hope National Medical Center, an organization devoted to the fight against cancer. The Best of Both Worlds Tour raised over US $2 million for the organization.
Document 8: Best of Both Worlds Concert (soundtrack): Best of Both Worlds Concert is the accompanying live album for the concert film "", released on March 11, 2008 by Walt Disney Records. It includes live performances of songs from the soundtrack albums "Hannah Montana" (2006) and "" (2007), which respectively accompany the first and second seasons of the television series "Hannah Montana". All fourteen tracks are performed by its primary actress Miley Cyrus, although the first half are credited to her title character Hannah Montana. The album was recorded in Salt Lake City, Utah in October 2007, during Cyrus' headlining Best of Both Worlds Tour.
Document 9: Hannah Montana 3: Hannah Montana 3 is the soundtrack album for the third season of the television series "Hannah Montana", released on July 6, 2009 by Walt Disney Records. Thirteen of its fourteen tracks are performed by the series' primary actress Miley Cyrus, and are credited to her titular character Hannah Montana. One of its actors Mitchel Musso contributes one song, while recording artists David Archuleta and Corbin Bleu appear as featured vocalists. In the vein of earlier soundtracks from the franchise, "Hannah Montana 3" is primarily a teen pop record, which sees additional influences from pop rock and country pop musical styles.
Document 10: Hannah Montana: The Movie (soundtrack): Hannah Montana: The Movie is the soundtrack for the . The film is an adaptation of the popular Disney Channel original series "Hannah Montana", which first aired in 2006. In the television series and film, American singer–songwriter and actress Miley Cyrus portrays Miley Stewart, a girl with a secret double life as the popstar Hannah Montana. Cyrus performs twelve of the songs on the album, seven of which are credited to Hannah Montana. American recording artists Billy Ray Cyrus, Taylor Swift, and Rascal Flatts and English recording artist Steve Rushton also have songs on the soundtrack.
Document 11: List of Bridgit Mendler concert tours: American singer-songwriter Bridgit Mendler has embarked on two concert tours, one of which have been worldwide. Her debut tour, "", started on August 25, 2012. Mendler played at state fairs and music festivals in the United States and Canada to promote her debut album "Hello My Name Is..." with the new songs. "Rocks at My Window" and "Hold On for Dear Love" were the only songs from the album not to be performed. She performing two covers songs in the shows, "Animal", originally by Neon Trees, and "This Love, by Maroon 5. She also sang a song from the soundtrack of "Lemonade Mouth", "Somebody". On January 19, 2013 Mendler in New York from UNICEF charity. Her second concert, the Summer Tour, visited North America in the leg one and started in Iowa and ended in Washington. In 2014 Mendler announced the second leg of the tour as part of the release of her upcoming second album. The leg started in Charlottetown, Canada, on June 28, 2014.
Document 12: Demi Lovato: Demetria Devonne Lovato, known professionally as Demi Lovato ( or ; born August 20, 1992), is an American singer, songwriter, and actress. After making her debut as a child actress in "Barney & Friends", Lovato rose to prominence in 2008 when she starred in the Disney Channel television film "Camp Rock" and released her debut single "This Is Me" which peaked at number nine on the "Billboard" Hot 100. The success of the film and its soundtrack resulted in a recording contract with Hollywood Records. Her debut album, "Don't Forget" (2008), debuted at number two on the US "Billboard" 200. The following year, Lovato was cast as the titular character of the television series "Sonny with a Chance" and she released her sophomore album, "Here We Go Again", which became her first one to top the "Billboard" 200 chart.
Document 13: Noah Cyrus: Noah Lindsey Cyrus (born January 8, 2000) is an American actress and singer. She voiced the title role in the English version of the 2009 animated feature film "Ponyo". In 2016, she released her debut single "Make Me (Cry)", featuring vocals from Labrinth. Her debut album is set to be released in late 2017. She is the youngest daughter of Tish Cyrus and Billy Ray Cyrus and the younger sister of Miley Cyrus and Trace Cyrus.
Document 14: Wonder World Tour (Miley Cyrus): The Wonder World Tour is the second concert tour by American recording artist Miley Cyrus. The tour was held to promote her second studio album "Breakout" (2008) and first extended play (EP) "The Time of Our Lives" (2009). It began in September 2009 and concluded in December 29, visiting cities in the United States and United Kingdom; thus, the Wonder World Tour became Cyrus' first world tour. It also became Cyrus' first tour not to incorporate performances as Hannah Montana, although "Let's Get Crazy", an official Hannah-song, was performed. Alternative band Metro Station served as opening act for all tour venues. It was sponsored by Wal-Mart and promoted by AEG Live. All tickets from the Wonder World Tour were sold using paperless ticketing, in order to prevent ticket scalping similar to what had occurred during Cyrus' previous tour. One dollar from each ticket sold was donated to the City of Hope National Medical Center, an organization devoted to the fight against cancer.
Document 15: Hannah Montana 2: Meet Miley Cyrus: Hannah Montana 2: Meet Miley Cyrus is a double album by American singer and actress Miley Cyrus and her fictional character Hannah Montana from the television series of the same name. It was released on June 26, 2007, by Walt Disney Records and Hollywood Records. The first disc serves as the soundtrack album from the second season of "Hannah Montana", while the second disc serves as the debut studio album by Cyrus, the series' primary actress. All twenty tracks are performed by Cyrus, although the first disc is credited to her character Hannah Montana in the vein of the original soundtrack, "Hannah Montana" (2006). The lyrical themes revolve largely around "girl power", teen romance, and the double life that Cyrus' character lives on the program.
ground_truth: Billy Ray Cyrus