Question: What is the name of the American singer songwriter and television personality whose identity was used in an off-Broadway musical based on 'American Idol' where contestants dream of winning a spot as the opening act for this celebrities new tour?

Context articles: Idol: The Musical
An American Idol Christmas
Clay Aiken
American Juniors
List of Demi Lovato live performances
Dezmond Meeks
American Idol Season 5: Encores
Falling (Trent Harmon song)
DialIdol
Diana DeGarmo

Idol: The Musical was an off-Broadway musical based on the popular TV show "American Idol".
 The story is about a group of "dork-like" characters who dream of winning a spot as the opening act in Clay Aiken's new tour.
 The music was written by Jon Balcourt, with lyrics co-written.
 The original story was conceived and outlined by Todd Ellis.
An American Idol Christmas (also titled A Very Idol Christmas in Canada) is a Christmas television special for the television shows "American Idol", "American Juniors" and "Canadian Idol", but focused mostly on "American Idol"– the Canadian winner Ryan Malcolm was edited out in the American release, due to legal reasons.
 The special was broadcast on the Fox television network in the United States and CTV in Canada.
 It was first broadcast on November 25, 2003 in the United States.
 It featured some of the top finalists of American Idol's first season (Kelly Clarkson, Tamyra Gray, Christina Christian) and second season (Ruben Studdard, Clay Aiken, Kimberley Locke); "Canadian Idol" winner Ryan Malcolm (not shown in American version due to the upcoming World Idol); and the American Juniors.
 Since the episode was not a competition, none of the judges appeared because they were working on the next season's contestants.
 It was directed by Bruce Gowers, produced by 19 Entertainment, Fremantle Media North America, Cécile Frot-Coutaz, Simon Fuller, David Goffin, Nigel Lythgoe and Ken Warwick.
Clay Aiken (born Clayton Holmes Grissom; November 30, 1978) is an American singer, songwriter, television personality, actor, author, politician, and activist.
 Aiken was the 2014 Democratic nominee in the North Carolina 2nd congressional district election.
American Juniors is an American reality television singing competition series that was broadcast for one season, in 2003, on the Fox Network.
 The series was a spin-off of "American Idol", but with younger contestants, and had the same production team as "American Idol": it was created by Simon Fuller and 19 Entertainment, along with FremantleMedia, and directed by Bruce Gowers, and produced by Nigel Lythgoe and Ken Warwick.
 However, unlike "American Idol", the goal of the competition was not to find a single winner, but rather to create a singing group of five of the contestants.
 In this way, "American Juniors" more closely resembled the British series "S Club Search", which had produced the group "S Club Juniors".
American singer Demi Lovato has embarked six concert tours and performed live at various award ceremonies and television shows.
 Her debut promotional tour in 2008, Demi Live!
 Warm Up Tour was based in North America only and supported her debut studio album, "Don't Forget" (2008).
 At the same year, Lovato served as one of the opening acts for Jonas Brothers on their fifth concert tour, Burnin' Up Tour.
 Lovato also served as one of the opening acts for Avril Lavigne on her third concert tour, The Best Damn World Tour on selected dates in North America.
 In 2009, Lovato performed as the opening act on the Jonas Brothers World Tour 2009 with Jonas Brothers during the South American and European legs, before she continued to tour her first headlining tour, during Summer 2009, promoting her debut album "Don't Forget" and her sophomore album "Here We Go Again".
 The tour featured opening acts, David Archuleta, Jordan Pruitt and KSM.
 In 2010, Lovato performed as the opening act on Jonas Brothers' Live in Concert World Tour 2010.
 On November 1, 2010, Lovato left the tour after a dispute arose to the public light involving her apparently punching one of the dancers of the tour.
 After Lovato left, she was interned in a treatment center to seek out help.
Dezmond Meeks (born February 27, 1983) is an American singer, songwriter, musician, actor, producer, dancer, fashionista and print model best known for his appearances on television shows 'American Idol' and 'America's Got Talent' on NBC, where he placed as a quarter-finalist on both shows.
American Idol Season 5: Encores is compilation album released on May 23, 2006 and contains one cover song from each of the top 12 finalists during season 5 of the television show "American Idol".
 It is the only "American Idol" album that does not feature an ensemble track by all the contestants, and is the first year in which several individual finalists made the popular music charts.
 The album sold over 154,000 units in its first week, according to Nielsen SoundScan.
 It debuted at number three on the "Billboard" 200, behind the Disney Channel Original Movie's "High School Musical Soundtrack" and the Dixie Chicks' "Taking the Long Way", thus becoming the best-selling debut any "American Idol" compilation disk.
 It was also number two on Top Soundtracks, number four on Top Digital Albums and number six on Top Internet.
"Falling" is the debut single by "American Idol" season fifteen winner Trent Harmon and is also his coronation song from the contest.
 It was co-written by singer songwriter and "American Idol" judge Keith Urban with Dallas Davidson and Brett James.
 This song also failed to chart on the Billboard Hot 100 thus making it the second and the final American Idol coronation single to do so.
DialIdol is both the name of a computer program for Microsoft Windows and its associated website that tracks voting trends for "American Idol" contestants.
 The program allows users to automatically vote for the "American Idol" contestants of their choice using their PC's modem.
 The program then reports back to the main website, which keeps track of the results based on the percentage of calls for each contestant that result in a busy signal.
 DialIdol assumes that more busy signals means more callers are attempting to vote for that contestant.
 DialIdol was created during the fourth season of "American Idol" and was released to the public at the start of the fifth season.
Diana Nicole DeGarmo (born June 16, 1987) is an American singer/songwriter and actress.
 She rose to fame in 2004 as the runner-up of the third season of "American Idol", releasing her debut studio album, "Blue Skies", later that year.
 The following year, DeGarmo ventured into a career in musical theatre.
 She has starred in two Broadway, one off-Broadway and three national tour shows.
 She made her television acting debut in a six-month arc as Angelina Veneziano on "The Young and the Restless."
 DeGarmo has since released two extended plays, "Unplugged in Nashville" (2009) and "Live to Love" (2012).
 She is married to fifth season "American Idol" finalist Ace Young.