To add to the long list of one-hit wonders stated previously:
"Reach Out of the Darkness" - Friend and Lover
"Will You Be Staying After Sunday" - The Peppermint Rainbow
"Tracy" - The Cuff Links
"Moonlight Feels Right" - Starbuck
"Hey There, Lonely Girl" - Eddie Holman
"Shannon" - Henry Gross
"It Never Rains in California" - Albert Hammond
"Na Na Hey Hey (Kiss Him Goodbye) - Steam
"Play That Funky Music" - Wild Cherry
"Where Have You Been All My Life" - Fotomaker
"Starry Eyes" - The Records
"Reach Out of the Darkness" - Friend and Lover
"Will You Be Staying After Sunday" - The Peppermint Rainbow
"Tracy" - The Cuff Links
"Moonlight Feels Right" - Starbuck
"Hey There, Lonely Girl" - Eddie Holman
"Shannon" - Henry Gross
"It Never Rains in California" - Albert Hammond
"Na Na Hey Hey (Kiss Him Goodbye) - Steam
"Play That Funky Music" - Wild Cherry
"Where Have You Been All My Life" - Fotomaker
"Starry Eyes" - The Records