Episode 2 of Season 3 of Glee is titled I Am Unicorn. Broadway star Idina Menzel returned to the show as Rachel's biological mother and the adoptive mother of Quinn's baby. Kurt kicked off his campaign for class president, and auditions began for the school's production of West Side Story. All three songs presented are from Broadway musicals.
"I'm the Greatest Star" is sung by Kurt Hummel in Glee as his audition for the role of Tony in the school's production of West Side Story. The song first appeared in the 1964 Broadway musical Funny Girl. It was sung by Barbra Streisand playing the role of Fanny Brice. She does not look like the typical star, but "I'm the Greatest Star" shows off her qualities as an entertainer. Kurt's audition is impressive, but it raises questions about whether his presentation on stage is masculine enough for the role of Tony.
"Somewhere" is sung on the show as a duet between Rachel Berry and Idina Menzel's guest character Shelby Corcoran. It serves as Rachel's audition for the role of Maria in West Side Story and represents elements of the relationship between Rachel and her birth mother Shelby. "Somewhere" was introduced in the 1957 Broadway musical West Side Story. It is sung in the show as a duet between Tony and Maria while they plan to run away and create a new dreamlike world for themselves. It has been recorded many times by a wide variety of artists. In 1985 Barbra Streisand released a single of the song from her album The Broadway Album. The arrangement for Glee is similar to the Barbra Streisand version.
Blaine Anderson sings "Something's Coming" as his audition for the school's production of West Side Story. He hopes for the role of Bernardo, but the strong masculinity of his performance makes the directors ask if he will consider the role of Tony, the part coveted by his boyfriend Kurt. "Something's Coming" was introduced in the 1957 Broadway musical West Side Story. It is sung early in the show by Tony anticipating that perhaps something interesting and new is around the corner.