Question: "Do You Want to Build a Snowman?" was composed by Kristen Anderson-Lopez, and the co-creator of "The Book of Mormon" whom is the youngest of how many people who have won an Emmy, a Grammy, an Oscar, and a Tony Award?

Context articles: For the First Time in Forever
Let It Go (Disney song)
Robert Lopez
Frozen (soundtrack)
Frozen (musical)
Love Is an Open Door
Do You Want to Build a Snowman?
Barbra Streisand
In Summer
Kristen Anderson-Lopez

"For the First Time in Forever" is a song from Disney's 2013 animated feature film "Frozen", with music and lyrics composed by Kristen Anderson-Lopez and Robert Lopez.
 It is reprised later in the musical.
 Both versions are sung by sisters Princess Anna (Kristen Bell) and Queen Elsa (Idina Menzel).
"Let It Go" is a song from Disney's 2013 animated feature film "Frozen", whose music and lyrics were composed by husband-and-wife songwriting team Kristen Anderson-Lopez and Robert Lopez.
 The song was performed in its original show-tune version in the film by American actress and singer Idina Menzel in her vocal role as Queen Elsa.
 Anderson-Lopez and Lopez also composed a simplified pop version (with shorter lyrics and background chorus) which was performed by actress and singer Demi Lovato over the start of the film's closing credits.
 A music video was separately released for the pop version.
Robert Lopez (born February 23, 1975) is an American songwriter of musicals, best known for co-creating "The Book of Mormon" and "Avenue Q", and for composing the songs featured in the Disney animated film "Frozen".
 He is the youngest of only twelve people who have won an Emmy, a Grammy, an Oscar and a Tony Award, and the quickest (10 years) to win all four.
Frozen: Original Motion Picture Soundtrack is the soundtrack to the 2013 Disney animated film, "Frozen".
 The soundtrack features 10 original songs written and composed by Kristen Anderson-Lopez and Robert Lopez, and twenty-two score pieces composed by Christophe Beck.
 It features the critically acclaimed song "Let It Go"—film version performed by Idina Menzel; single version performed by Demi Lovato—which won the Academy Award for Best Original Song, the Grammy Award for Best Song Written for Visual Media, and the Critics' Choice Award for Best Song, and was nominated for the Golden Globe Award for Best Original Song.
Frozen is a musical with music and lyrics by Kristen Anderson-Lopez and Robert Lopez and book by Jennifer Lee based on the 2013 film of the same name.
"Love Is an Open Door" is a song written by Kristen Anderson-Lopez and Robert Lopez for Walt Disney Animation Studios's 53rd animated feature film "Frozen" (2013).
 Performed by Kristen Bell and Santino Fontana as Anna and Prince Hans respectively, "Love Is an Open Door" is a romantic duet which takes place during the first act of the film, when Anna meets Hans during the reception of her sister Elsa's coronation.
 The song was intended by Lopez and Anderson-Lopez to "feel like the perfect first date", inspired by the date depicted in the film "The Karate Kid" (1984).
"Do You Want to Build a Snowman?"
 is a song from the 2013 Disney animated feature film "Frozen", with music and lyrics composed by Kristen Anderson-Lopez and Robert Lopez.
 As of November 25, 2016, the total sales of the digital track stands at 1,600,000 downloads according to Nielsen SoundScan, placing it second on the list of all-time best-selling Christmas/holiday digital singles in SoundScan history (behind Mariah Carey's 1994 hit single, "All I Want for Christmas Is You").
Barbara Joan "Barbra" Streisand ( ; born April 24, 1942) is an American singer, songwriter, actress, and filmmaker.
 In a career spanning six decades, she has achieved success in multiple fields of entertainment and has been recognized with two Academy Awards, ten Grammy Awards including the Grammy Lifetime Achievement Award and the Grammy Legend Award, five Emmy Awards including one Daytime Emmy, a Special Tony Award, an American Film Institute award, a Kennedy Center Honors prize, four Peabody Awards, the Presidential Medal of Freedom, and nine Golden Globes.
 She is among a small group of entertainers who have been honored with an Emmy, Grammy, Oscar, and Tony Award, and is one of only two artists in that group who have also won a Peabody.
"In Summer" is a song from Disney's 2013 animated feature film "Frozen", with music and lyrics composed by Kristen Anderson-Lopez and Robert Lopez.
Kristen Anderson-Lopez is an American songwriter.
 Anderson-Lopez, along with her husband Robert Lopez and Henry Jackman, wrote and produced music for the 2011 Disney film "Winnie the Pooh", for which they were nominated for an Annie Award for Best Music in a Feature Production.
 She also provided the voice of Kanga in the film.
 Additionally, she wrote songs for a Walt Disney World production of "Finding Nemo – The Musical".
 She and her husband also wrote the songs for Disney's "Frozen" including "Let It Go", for which they won the Academy Award for Best Original Song at the 86th Academy Awards and two Grammy Awards at the 57th Annual Grammy Awards.