#2 in June 1965,Ed Sullivan Show Performance

"This Diamond Ring" hit number one on the Billboard Hot 100 on February 20, 1965,[9] making Lewis an instant star. Lewis was Cash Box magazine's 1965 "Male Vocalist of the Year".[3] Besides The Lovin' Spoonful, the group was the only artist during the 1960s to have its first seven Hot 100 releases each reach that chart's top 10. Wiki

#3 in January 1966 from the LP "She's Just My Style"