I am sure this is a cover, but KWS was the most popular for it right?
Please Don't Go - KWS (HQ Audio) - YouTube
and we gotta have Haddaway
What Is Love - Haddaway (HQ Audio) - YouTube
If these are not one-hit wonders let me know.
*now I'm waiting on one of you, most likely screen13 or Kelli to tell me these aren't one-hit wonders...I swear you guys know too much about music