There have been 1,097 artists with their only top 40 Billboard song debuting between 1970 and 2011. However, cutoff was 2006 to leave out newer unestablished artists...SEE NOTES BELOW.
NOTES - UDPATED for accuracy on 4/21...Artists grouped alphabetically BY FIRST NAME in groups of 5-6. For artists beginning with "THE" it has been removed. Tried my best at some removals - such as duets/collaborations where the individual artists generally performed solo or with a group. Also tried to solo artists who had Top-40 singles as part of a group..groups were left in the list even if an individual member was successful. A handful of other minor removals were made, such as songs done by Casts of shows or musicals or large collaborations such as USA for Africa. Some artists you'd swear should be here actually had a 2nd top 40 hit.