Maybe one of you can help me....

What song or music is playing when Jackie turns on the radio and
begins kissing Kelso at the end of episode 14, season 1 ("Stolen
Car")? The same song/music is playing in episode 21 (Water Tower), season 1, when Donna and Eric are in the car together.

The same song/music is in 77, season 4 ("It's a Wonderful Life") when Eric and Donna are sitting on the hood of the Vista Cruiser ( it's a replay of a scene in the pilot, but the song is different from the one playing in the pilot. The song in the original pilot scene is Rundgren's "Hello it's Me").

I really like this song/music -- if anyone can help me I'd appreciate it.