Question: Sonja Kristina starred in which musical that had lyrics by James Rado and Gerome Ragni?

Context paragraphs:
Ain't Got No, I Got Life: "Ain't Got No/I Got Life" is a 1968 single by American singer-songwriter Nina Simone, from her album "'Nuff Said".  It is a medley of two songs, "Ain't Got No" and "I Got Life", from the musical "Hair", with lyrics by James Rado and Gerome Ragni and music by Galt MacDermot.  The song peaked at number 2 in the UK and at number 1 in the Netherlands.  It also charted on the "Billboard" Hot 100, where it reached number 94.  The song helped Simone gain popularity under a new, younger audience, and became a standard in her repertoire.

Hair (Original Broadway Cast Recording): Hair is a 1968 cast recording of the musical "Hair" on the RCA Victor label.  Sarah Erlewine, for Allmusic, wrote: "The music is heartening and invigorating, including the classics 'Aquarius,' 'Good Morning Starshine,' 'Let the Sunshine In,' 'Frank Mills' ... and 'Easy to Be Hard.'  The joy that has been instilled in this original Broadway cast recording shines through, capturing in the performances of creators Gerome Ragni and James Rado exactly what they were aiming for – not to speak for their generation, but to speak for themselves."

James Rado: James Rado (born James Alexander Radomski; January 23, 1932) is an American actor, playwright, director, writer and composer, best known as the co-author, along with Gerome Ragni, of 1967's groundbreaking American tribal love-rock musical "Hair".  He and Ragni were nominated for the 1969 Tony Award for best musical, and they won for best musical at the Grammy Awards in 1969.

Hair (musical): Hair: The American Tribal Love-Rock Musical is a rock musical with a book and lyrics by James Rado and Gerome Ragni and music by Galt MacDermot.  A product of the hippie counterculture and sexual revolution of the late 1960s, several of its songs became anthems of the anti-Vietnam War peace movement.  The musical's profanity, its depiction of the use of illegal drugs, its treatment of sexuality, its irreverence for the American flag, and its nude scene caused much comment and controversy.  The musical broke new ground in musical theatre by defining the genre of "rock musical", using a racially integrated cast, and inviting the audience onstage for a "Be-In" finale.

Sonja Kristina: Sonja Kristina (born Sonja Christina Shaw, 14 April 1949, in Brentwood, Essex) is an English songwriter, musician and actress, best known for starring in the seminal 1960s musical, "Hair", and for being the lead vocalist of the 1970s progressive rock band, Curved Air.

Aquarius/Let the Sunshine In: "Medley: Aquarius/Let the Sunshine In (The Flesh Failures)" (commonly called "Aquarius/Let the Sunshine In", "The Age of Aquarius" or "Let the Sunshine In") is a medley of two songs written for the 1967 musical "Hair" by James Rado & Gerome Ragni (lyrics), and Galt MacDermot (music), released as a single by American R&B group The 5th Dimension.  The song peaked at number one for six weeks on the US "Billboard" Hot 100 pop singles chart in the spring of 1969.  The single topped the American pop charts and was eventually certified platinum in the US by the RIAA.  Instrumental backing was written by Bill Holman and provided by session musicians commonly known as the Wrecking Crew.  The actual recording is something of a "rarity"; the song was recorded in two cities, Los Angeles and Las Vegas, then mixed together in the studio, afterwards.

Easy to Be Hard: "Easy to Be Hard" is a song from the rock musical "Hair".  It was written by Galt MacDermot, James Rado, and Gerome Ragni, who put the musical together in the mid-1960s.  The original recording of the musical featuring the song was released in May 1968 with the song being sung by Lynn Kellogg, who performed the role of Sheila on stage in the musical.  The song was first covered by American band Three Dog Night on their 1969 album "Suitable for Framing", with the lead vocal part sung by Chuck Negron, and was produced by Gabriel Mekler.

Hair (Original Off-Broadway Cast Recording): Hair is the cast recording of the original, Off-Broadway cast of the musical "Hair: An American Tribal Love-Rock Musical".  It was released in 1967 by RCA Victor.  "Hair" premiered Off-Broadway at the Public Theater on October 17, 1967, and the cast album was recorded two weeks later.  The lead roles were played by Walker Daniels as Claude, Gerome Ragni as Berger, Jill O'Hara as Sheila, Steve Dean as Woof, Arnold Wilkerson as Hud, Sally Eaton as Jeanie and Shelley Plimpton as Crissy.

Gerome Ragni: Gerome Ragni (born Jerome Bernard Ragni; September 11, 1935 – July 10, 1991) was an American actor, singer and songwriter, best known as the co-author of the groundbreaking 1960s musical "".

Dude (musical): Dude (The Highway Life) is a rock musical with a book and lyrics by Gerome Ragni and music by Galt MacDermot.  It is an allegory about good and evil, the conflict between mankind's creative and destructive urges, the power of love, and the joy to be found in simple pleasures.  Dude is an Everyman who loses his innocence and fights to regain it.

Supporting paragraphs: Sonja Kristina Hair (musical)
Answer: Hair