I haven't heard a lot of hits from pre-2005 for obvious reasons. Only the bigger ones that stood the test of time, and the ones by artists who made more impact like Queen, MJ, Lauryn Hill, Madonna, Alanis, etc.
Plenty. I don't listen to the radio so I only hear hits if I'm interested in the artist or checking out what all the fuss is about. Rude by MAGIC(?) is an example.