Happiness - Matthew Sweet
I apologize if this is cheating:
“I’d like to teach the world to sing” coke commercialhttps://www.youtube.com/watch?v=ib-Qiyklq-Q
Full version by The New Seekers (no coke)
https://www.youtube.com/watch?v=Jg22W6oro-U
DeBarge - Rhythm Of The Night
Mouth and McNeal-How Do You Do
oh, yes! Yay, Mickey!
Lollipop sung by the Chordettes.
and a version by Millie Small, who could not be cuter (wait for the lights to come on).
ETA: Wow – those are not the same song. I never realized that before.
Love Grows (Where My Rosemary Goes) - Edison Lighthouse
La Bamba (I don’t know Spanish, and have no clue what they are actually singing about, but it’s always seemed like a happy song to me)
https://www.youtube.com/watch?v=nLAWPrCUQQ0
Schoolhouse Rock!
3 is a Magic Number: - YouTube
Emperor Norton’s Hunch
https://www.youtube.com/watch?v=6i2N4R7RqsY