[Shaun]

Not to be confused with actual 1HWs, just mention songs that are the only one from successful artists that you like.

For example,
Rednex - Cotton Eye Joe wouldn't count because it WAS a one-hit-wonder. The following are mine:

Hole - Celebrity Skin
Jamie T - Sticks 'n Stones
Janet Jackson - All For You
Jessica Simpson - Public Affair
Enrique Iglesias - Hero
Duffy - Rain On Your Parade
Cher - Believe
Adam Ant - Goody Two Shoes
Keri Hilson - Knock You Down
Kevin Rudolf - Let It Rock
Le Tigre - Deceptacon
Little Boots - Remedy
Mariah Carey - All I Want For Christmas Is You
Mis-Teeq - Scandalous
Nelly - Dilemma
New Order - Blue Monday
Noah and the Whale - 5 Years Time
Oomph! - Augen Auf
Reef - Place Your Hands
Sara Bareilles - Love Song
Tom Petty - Free Fallin'
Wyclef Jean - Perfect Gentleman
50 Cent - Ayo Technology