The group with the most popular version of the song was the Searchers.
“Love Potion No. 9” is a song written in 1959 by Jerry Leiber and Mike Stoller. It was originally performed by the Clovers,[1] who took it to number 23 on the US as well as R&B charts that year.[2][3]
The song was recorded by The Searchers in 1964. Their version reached number three on the U.S. Billboard Hot 100 and number two on Cash Box during the winter of 1965.[4]
Herb Alpert and The Tijuana Brass did an instrumental version (side 2, track 1) on his 1965 album Whipped Cream and Other Delights.
The Coasters released a version in December 1971 with “D. W. Washburn” on the B side. It reached #76 in the Billboard Pop Chart and #96 in the Cash Box Pop Chart.” —Wikipedia
YouTube: The Searchers - Love Potion No. 9
https://www.youtube.com/watch?v=36WVirpAieM