Title: Suite: Judy Blue Eyes
Content:  "Suite: Judy Blue Eyes" is a song written by Stephen Stills and performed by Crosby, Stills & Nash (CSN). It appeared on the group's self-titled debut album in 1969 and was released as a single, reaching #21 on the Billboard Hot 100 pop singles chart. In Canada, "Suite: Judy Blue Eyes" peaked at number 11. The song imitates the form of a classical music suite as an ordered set of musical pieces.
Title: Suite: Judy Blue Eyes
Content:  The title "Suite: Judy Blue Eyes" (a play on words for "Sweet Judy Blue Eyes") refers to Stephen Stills' former girlfriend, singer/songwriter Judy Collins, and the lyrics to most of the suite's sections consist of his thoughts about her and their imminent breakup. During a July 15, 2007 interview for the National Public Radio program All Things Considered, Stills revealed that Collins was present in the studio when the demo tapes were recorded and had advised him, "Don't stay in here [in the studio] all night now." Stills also commented that the breakup with Collins "was imminent. ... We were just a little too big for one house." Stills said that he liked parts of this demo version of "Suite: 
Title: Suite: Judy Blue Eyes
Content:  The recording features an acoustic guitar tuned to EEEEBE ("Bruce Palmer Modal Tuning" ) vs. the standard EADGBE tuning. This style of tuning would later be used for the Déjà Vu songs "4+20" and "Carry On". "Suite: Judy Blue Eyes" has four distinct sections. The timings below are for the full album version. The shortened version released as a single cut the second and fourth verses from the first section, the third and fourth verses from the second section, and the final verse and preceding break from the third section, and shortened the guitar break between the second and the third sections. The final section is the only part that stayed fully intact on the single. The first section is a traditional pop song with four verses, featuring a chorus of "I 
Title: Suite: Judy Blue Eyes
Content:  yours, you are mine, you are what you are." Running at approximately 2:56, the lead vocal is performed by Stills, with Crosby and Nash providing harmonies. The second section is performed in half time relative to the first section, and features four verses of three-part harmony from the band, with Stills performing a brief vocal solo between the second and third. This section runs from 2:56 to 4:43. This is followed by Stills acoustic guitar solo, connecting the two sections. The third section is more upbeat and features poetic lyrics ("chestnut brown canary, ruby-throated sparrow"), lasting from 4:43 to 6:25. Each of the three phrases is initially sung by Stills, with Nash then joining, and finally Crosby rounding out the harmonies. Connecting the phrases are instrumental breaks performed by Stills on 
Title: Suite: Judy Blue Eyes
Content: David Crosby – harmony vocals ; Stephen Stills – lead and harmony vocals, electric and acoustic guitars, bass, Hammond B-3 organ, percussion ; Graham Nash – harmony vocals ; Dallas Taylor – drums and percussion 
Title: Suite: Judy Blue Eyes
Content:  The final section of the song is included on the CSNY live album 4 Way Street. It fades in on the opening of side one of the album. CSN also performed "Suite: Judy Blue Eyes" as their opening song at the Woodstock and Live Aid festivals, and their performance at the former is featured in the film Woodstock (1970).
Title: Suite: Judy Blue Eyes
Content:  Blue Eyes" better than the released version; the song and other demos of early Crosby, Stills and Nash songs were released commercially on the album Just Roll Tape. Collins and Stills had met in 1967 and dated for two years. In 1969, she was appearing in the New York Shakespeare Festival musical production of Peer Gynt and had fallen in love with her co-star Stacy Keach, eventually leaving Stills for him. Stills was devastated by the possible breakup and wrote the song as a response to his sadness. In a 2000 interview, Collins gave her impressions of when she first heard the song: "[Stephen] came to where I was singing one night on the West Coast and brought his guitar 
Title: Suite: Judy Blue Eyes
Content:  guitar. The final section (the coda) is sung in Spanish, with "doo-doo-doo-da-doo" backing vocals, starting at 6:34 until the song concludes. Stills has said that he intentionally made the final stanzas unexpected and difficult, even using a foreign language for the lyrics, "just to make sure nobody would understand it" (not even Spanish speaking people). The final section has been parodied many times, notably in Frank Zappa's compositions "Billy the Mountain" and "Magdalena" on The Mothers of Invention's album Just Another Band From L.A. "Weird Al" Yankovic performs a takeoff of it ("Mission Statement") on his 2014 album Mandatory Fun; instead of Spanish, the lyrics are corporate buzzwords strung together in such a way as to be ultimately nonsensical. It is also sampled in the 2010 Cypress Hill song "Armada Latina".
Title: Suite: Judy Blue Eyes
Content:  the hotel and he sang me "Suite: Judy Blue Eyes," the whole song. And of course it has lines in it that referred to my therapy. And so he wove that all together in this magnificent creation. So the legacy of our relationship is certainly in that song." Collins elaborated in a 2017 interview: "Afterwards, we both cried – and then I said: "Oh, Stephen, it’s such a beautiful song. But it’s not winning me back." I’ve always understood that people have to write about their lives. Most of all, I felt the song was flattering and heartbreaking – for both of us. Neither one of us walked away from that relationship relieved. We were feeling like, "Whoa, what happened?”"
Title: Everybody Knows (Stills &amp; Collins album)
Content:  From 1968 to 1969, Stills and Collins were romantically involved. Stills wrote several songs about Judy, most notably "Suite: Judy Blue Eyes" and "Judy". But despite Stills playing on several of Collins' recordings, they never recorded as a duo or performed on stage together. Stills said that he and Collins "talked over the years and muddled through conversations about if we did make a record together", ultimately releasing Everybody Knows and going on tour.

Question: who was suite judy blue eyes written about?
Answer: singer/songwriter Judy Collins.
Judy Collins.