Final answer:
The 100th Top 40 hit referenced in the question is 'Steamroller Blues,' released in 1973 and performed by Elvis Presley.
Step-by-step explanation:
The subject of this question is music. The 100th Top 40 hit referenced in the question is 'Steamroller Blues.' It was released in 1973 and was taken from the TV special 'Aloha From Hawaii' by Elvis Presley.