Who sung these two '60's R & B /soul one hit wonder songs ?!

Question: Two of my favorite R & B/soul songs of the '60's where hit songs made by 2 different groups who never made the R & B charts again after these one hit wonders. 10 points to the first person who can name the group that sung " She Blew A Good Thing " & also name the group that sung " No Man Is An Island " ???

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Answers: Two of my favorite R & B/soul songs of the '60's where hit songs made by 2 different groups who never made the R & B charts again after these one hit wonders. 10 points to the first person who can name the group that sung " She Blew A Good Thing " & also name the group that sung " No Man Is An Island " ???

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She Blew A Good Thing - The Poets
No Man Is An Island - The Van Dykes

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