Devious...Mmmbop was one of those ridiculous pop songs that was so catchy, but yeah I'd have to say it is a one-hit wonder. Some of Hanson's songs have done ok, but really I only remember them for Mmmmbop.
Blooz...I remember Lenny Kravitz for two songs...'Are you gonna go my way' AND 'Fly away', but I think he fits on this thread nicely. Its not like he had 10 or more top hits. I love him to death, but he just didn't tear up the charts or sales like I thought he should have.
My next one-hit wonder choice...
Ray Parker Jr. - GHOSTBUSTERS
Ray Parker Jr.- Ghostbusters (Released '84, Billboard #1) - YouTube