Great thread! It gives me ideas of songs I've wanted to buy on CDs but haven't gotten around to yet.
I love most of the songs already mentioned, but here are a few more (maybe not so main-stream) that I don't think have been listed yet:
(Keep Feeling) Fasincation, Human League
When I Hear Music, Debbie Deb
Dreamin', Will to Power
Tenderness, General Public
Dream Team is in the House, LA Dream Team
Sister Christian, Night Ranger
The Only One, Lionel Richie
Ice Cream Castles, Morris Day and the Time
You're the Inspiration, Chicago
High on You, Survivor
And I'm going to throw in Rock Lobster, B-52s, even though it's already been mentioned several times, because it's a classic! Down, down, down...
(P.S. Does anyone think that the people who wrote a lot of these songs must've been high at the time?)