Problem: Background: Ellington was born on April 29, 1899, to James Edward Ellington and Daisy (Kennedy) Ellington in Washington, D.C. Both his parents were pianists. Daisy primarily played parlor songs and James preferred operatic arias.
Context: World War II brought about a swift end to the big band era as musicians went off to serve in the military and travel restrictions made touring difficult. When the war ended, the focus of popular music shifted towards crooners such as Frank Sinatra and Jo Stafford, so Ellington's wordless vocal feature "Transblucency" (1946) with Kay Davis was not going to have a similar reach. With inflation setting in after 1945, the cost of hiring big bands went up and club owners preferred smaller jazz groups who played in new styles such as bebop. Dancing in clubs also subjected club owners to a new wartime tax which continued for many years after, which made small bands more cost-effective for club owners. Ellington continued on his own course through these tectonic shifts. While Count Basie was forced to disband his whole ensemble and work as an octet for a time, Ellington was able to tour most of Western Europe between April 6 and June 30, 1950, with the orchestra playing 74 dates over 77 days. During the tour, according to Sonny Greer, the newer works were not performed, though Ellington's extended composition, Harlem (1950) was in the process of being completed at this time. Ellington later presented its score to music-loving President Harry Truman. Also during his time in Europe, Ellington would compose the music for a stage production by Orson Welles. Titled Time Runs in Paris and An Evening With Orson Welles in Frankfurt, the variety show also featured a newly discovered Eartha Kitt, who performed Ellington's original song "Hungry Little Trouble" as Helen of Troy. In 1951, Ellington suffered a significant loss of personnel: Sonny Greer, Lawrence Brown, and most importantly Johnny Hodges left to pursue other ventures, although only Greer was a permanent departee. Drummer Louie Bellson replaced Greer, and his "Skin Deep" was a hit for Ellington. Tenor player Paul Gonsalves had joined in December 1950 after periods with Count Basie and Dizzy Gillespie and stayed for the rest of his life, while Clark Terry joined in November 1951. During the early 1950s, Ellington's career was at a low point with his style being generally seen as outmoded, but his reputation did not suffer as badly as some artists. Andre Previn said in 1952: "You know, Stan Kenton can stand in front of a thousand fiddles and a thousand brass and make a dramatic gesture and every studio arranger can nod his head and say, Oh, yes, that's done like this. But Duke merely lifts his finger, three horns make a sound, and I don't know what it is!" However, by 1955, after three years of recording for Capitol, Ellington lacked a regular recording affiliation.
Question: why did his music appear to be outmoded?
Answer: When the war ended, the focus of popular music shifted towards crooners

Problem: Background: The Rise and Fall of Ziggy Stardust and the Spiders from Mars (often shortened to Ziggy Stardust) is the fifth studio album by English musician David Bowie, released on 16 June 1972 in the United Kingdom. It was produced by Bowie and Ken Scott and features contributions from the Spiders from Mars, Bowie's backing band - Mick Ronson, Trevor Bolder and Mick Woodmansey. The album was recorded in Trident Studios, London, like his previous album, Hunky Dory. Most of the album was recorded in November 1971 with further sessions in January and early February 1972.
Context: The Rise and Fall of Ziggy Stardust and The Spiders from Mars is about a bisexual alien rock superstar, called Ziggy Stardust. Ziggy Stardust was not conceived as a concept album and much of the story was written after the album was recorded. The characters were androgynous. Mick "Woody" Woodmansey, drummer for the Spiders from Mars, said the clothes they had worn had "femininity and sheer outrageousness", and that the characters' looks "definitely appealed to our rebellious artistic instincts". Nenad Georgievski of All About Jazz said the record was presented with "high-heeled boots, multicolored dresses, extravagant makeup and outrageous sexuality". Bowie had already developed an androgynous appearance, which was approved by critics, but received mixed reactions from audiences. His love of acting led his total immersion in the characters he created for his music. After acting the same role over an extended period, it became impossible for him to separate Ziggy Stardust (and subsequently The Thin White Duke) from his own offstage character. Bowie said that Ziggy "wouldn't leave me alone for years. That was when it all started to go sour ... My whole personality was affected. It became very dangerous. I really did have doubts about my sanity." The character was inspired by British rock 'n' roll singer Vince Taylor, whom David Bowie met after Taylor had had a breakdown and believed himself to be a cross between a god and an alien. However, Taylor was only part of the blueprint for the character. Other influences included the cult musician Legendary Stardust Cowboy and Kansai Yamamoto, who designed the costumes Bowie wore during the tour. An alternative theory is that, during a tour, Bowie developed the concept of Ziggy as a melding of the persona of Iggy Pop with the music of Lou Reed, producing "the ultimate pop idol". A girlfriend recalled his "scrawling notes on a cocktail napkin about a crazy rock star named Iggy or Ziggy", and on his return to England he declared his intention to create a character "who looks like he's landed from Mars". The Ziggy Stardust name came partly from the Legendary Stardust Cowboy, and partly because Ziggy was "one of the few Christian names I could find beginning with the letter 'Z'". In 1990, Bowie explained that the "Ziggy" part came from a tailor's shop called Ziggy's that he passed on a train. He liked it because it had "that Iggy [Pop] connotation but it was a tailor's shop, and I thought, Well, this whole thing is gonna be about clothes, so it was my own little joke calling him Ziggy. So Ziggy Stardust was a real compilation of things." In the album's plotline, humanity will end within five years, because of lack of natural resources. Ziggy Stardust starts to believe in the existence of "infinites", extraterrestrial beings who are black hole jumpers, and in a spaceman who will be coming down to save the Earth. According to Bowie, he "takes himself up to the incredible spiritual heights and is kept alive by his disciples". During the song "Rock 'n' Roll Suicide", the infinites arrive, and tear Ziggy Stardust to pieces on stage, taking his elements to become visible.
Question: Did anyone collaberate with him on concepts?
Answer:
The Ziggy Stardust name came partly from the Legendary Stardust Cowboy, and partly because Ziggy was "one of the few Christian names I could find beginning with the letter 'Z'".