Question: What Illinois singer's music has been featured on a show that stars Tyler Posey as a teenager named Scott McCall?

Context paragraphs:
Mythology of Teen Wolf: The mythology of the MTV supernatural action drama series "Teen Wolf" follows a teenager named Scott McCall (Tyler Posey), who is bitten by an Alpha werewolf and must cope with how it affects his life and the lives of those closest to him and Dylan O'Brien as "Stiles" Stilinski, Scott's best friend.  Most mythological elements in Teen Wolf relate to supernatural creatures and draws heavily from Greek mythology, Norse mythology, Japanese mythology, Aztec mythology, Native American beliefs and Celtic herbalism.  The show has created its own unique mythos centered around shapeshifters and their connections to one-another throughout the world.

Teen Wolf (2011 TV series): Teen Wolf is an American television series developed by Jeff Davis for MTV.  It is loosely based on the 1985 film of the same name, and stars Tyler Posey as a teenager named Scott McCall, who is bitten by a werewolf and must cope with how it affects his life and the lives of those closest to him, and Dylan O'Brien as "Stiles" Stilinski, Scott's best friend.  The series has received generally positive reviews from critics and is a fan favorite on social media.

White Frog: White Frog is an 2012 American film written by Fabienne Wen and Ellie Wen and directed by Quentin Lee.  It is a drama-comedy, aimed at young adults, about 16-year-old Nick Young (Booboo Stewart), a neglected teen with Asperger syndrome whose life is changed forever when tragedy hits his family.  It is a story of the power of family, friendship, and love.  Along with Stewart, the film also stars Harry Shum, Jr., B.D. Wong, Joan Chen, Gregg Sulkin and Tyler Posey.

List of Teen Wolf episodes: "Teen Wolf" is an American supernatural drama developed by Jeff Davis loosely based upon the 1985 film of the same name and a screenplay by Jeph Loeb & Matthew Weisman, which premiered on June 5, 2011 on MTV.  The series stars Tyler Posey as Scott McCall, a teenager who transforms into a werewolf after being bitten by one.

Tyler Posey: Tyler Garcia Posey (October 18, 1991) is an American actor and musician, best known for his role as Scott McCall on the MTV television series "Teen Wolf" (2011–2017).

Truth or Dare (2018 film): Truth or Dare is an upcoming American supernatural horror film directed by Jeff Wadlow and written by Wadlow, Christopher Roach, Michael Reisz and Jillian Jacobs.  It stars Lucy Hale, Tyler Posey, Violett Beane, Nolan Gerard Funk, Hayden Szeto and Sophia Taylor Ali.  Jason Blum is serving as a producer through his Blumhouse Productions banner and Universal Pictures are distributing the film.

Legendary (film): Legendary is a 2010 drama film directed by Mel Damski.  The film stars Devon Graye as a high school wrestler, in a cast that features John Cena, Patricia Clarkson, Danny Glover, Madeleine Martin, and Tyler Posey.  The film was released on September 10, 2010.

List of Teen Wolf characters: "Teen Wolf" is an American television series that airs on MTV.  The series premiered on Sunday, June 5, 2011, following the 2011 MTV Movie Awards.  "Teen Wolf" is a supernatural drama series that follows Scott McCall (Tyler Posey), a high school student and social outcast who is bitten by a werewolf.  He tries to maintain a normal life while hiding his secret and dealing with supernatural dangers that plague the town of Beacon Hills.  He is aided by his best friend, Stiles Stilinski (Dylan O'Brien), and mysterious werewolf, Derek Hale (Tyler Hoechlin).

William Fitzsimmons (musician): William Fitzsimmons (born 1978) is an American singer-songwriter, based in Illinois, perhaps best known for his songs "Passion Play" and "Please Don't Go", which aired during pivotal scenes in ABC's medical drama "Grey's Anatomy".  His first two full-length albums, "Until When We Are Ghosts" (2005) and "Goodnight" (2006), were completely self-produced and recorded by Fitzsimmons at his former home in Pittsburgh, Pennsylvania.  His "The Sparrow And The Crow" (2008) was his first studio record.  In addition to the above, his music has also been featured on ABC's "Brothers & Sisters" and Grey's Anatomy spin-off "Private Practice", MTV's "Life of Ryan" and "Teen Wolf", The CW's "One Tree Hill", CBS's "Blue Bloods", ABC Family's "Greek", Lifetime's "Army Wives", and USA Network's "Burn Notice", and he has been given reference in "Billboard", "Rolling Stone", "Paste", "Spin", "Musikexpress", "Uncut", "Q Magazine", and "Performing Songwriter Magazine".

Kenny Roby: Kenny Roby is a North Carolina-based singer-songwriter.  He's the former lead singer of 6 String Drag, which he formed with old friend bassist Rob Keller in the early 1990s and became one of the main bands of the era's so called Americana movement.  The band's style ranged from old style country with a hint of soul and gospel to rock.  While 6 String Drag broke up in the late 1990s, Roby continues to make records and play live shows with the Mercy Filter, which includes Scott McCall of $2 Pistols.  In 2013 Roby released Memories & Birds which he described as "almost a concept album".  In 2015, Roby reunited the original members of 6 String Drag and released Roots Rock 'N' Roll, of which Roby says "the songs kind of lent themselves to a 50’s and 60’s style."

Supporting paragraphs: William Fitzsimmons (musician) Teen Wolf (2011 TV series)
Answer: William Fitzsimmons