when did the first singer mentioned above, debut?
On 24 October,2006.
Taylor Swift
 She began working on her eponymous debut album shortly after. Swift persuaded Big Machine to hire her demo producer Nathan Chapman, with whom she felt she had the right "chemistry". She wrote three of the album's songs alone, and co-wrote the remaining eight with Rose, Robert Ellis Orrall, Brian Maher, and Angelo Petraglia. "Taylor Swift" was released on October 24, 2006. Jon Caramanica of "The New York Times" described i
taylor swift and ed sheeran everything has changed Yes, they wrote and recorded the song. was it a single? It was released as the sixth single from an album. was there a video made for it? Yes, it was.
wiki:15636727
Taylor Swift [SEP] 2004–2008: Career beginnings and "Taylor Swift"
She sent him her first gold record with a note that said, "Thanks for playing too long and too loud on the Flatts tour. I sincerely appreciate it. Taylor." Borchetta said that although record industry peers initially disapproved of his signing a 16-year-old singer-songwriter, Swift tapped into a previously unknown market—teenage girls who listen to country music. Following "Tim McGraw", four more singles were released throughout 2007 and 2008: "Teardrops on My Guitar", "Our Song", "Picture to Burn" and "Should've Said No". All appeared on "Billboard"s Hot Country Songs chart in the United States, with "Our Song", and "Should've Said No" reaching number one.