List of best-selling singles

Columns: Artist | Single | Released | Sales ( in millions )
Tony Orlando and Dawn | Knock Three Times | 1970 | 6 | Elvis Presley | Do n't Be Cruel | 1956 | 6 | Queen | Bohemian Rhapsody | 1975 | 6 | Harry Simeone Chorale | The Little Drummer Boy | 1958 | 6 | Simon & Garfunkel | Bridge over Troubled Water | 1970 | 6 | Bonnie Tyler | It 's a Heartache | 1977 | 6

Example questions:
What was the 1st film to feature the artist to performed the latest best selling single under 7 million ? | How many records has the artist to release a best-selling single with backing provided by Gene Estes sold ? | How many million singles were sold from the album used as the Dangerous Minds soundtrack making it best-selling ? | Who formed the group to perform a best-selling single that developed from a Coca-Cola advert jingle ? | When was the best selling single performed by the artists to sing Say released producing under 7 million ?

Answers:
Poetic Justice | 100 million records | 6 | Keith Potger | 1970