Whose album was the first to reach number one in its first week of release on the US Billboard 200?

"Captain Fantastic and the Brown Dirt Cowboy" is the ninth studio album by Elton John. The album is an autobiographical account of the early musical careers of Elton John (Captain Fantastic) and his long-term lyricist Bernie Taupin (the Brown Dirt Cowboy). It was released in May 1975 by MCA in America and DJM in the UK and was an instant commercial success. The album reached number 1 in its first week of release on the US Billboard 200, the first ever album to do so, reportedly selling 1.4 million copies within 4 days of release, and it stayed in that position in the chart for seven weeks.

Sir Elton Hercules John (born Reginald Kenneth Dwight; 25 March 1947) is an English singer, songwriter, pianist, and composer. He has worked with lyricist Bernie Taupin since 1967; they have collaborated on more than 30 albums. John has sold more than 300 million records, making him one of the world's best-selling music artists. He has more than fifty Top 40 hits, as well as seven consecutive number-one albums in the United States, 58 Billboard Top 40 singles, 27 Top 10 singles, four of which peaked at number two and nine of which reached number one.