This video clip is perfect.
It's a lot of things. It's Eric Carmen's hair. It's Louise Mandrell's prom dress. It's the Miami Vice outfit. It's their intense singing styles. It's the way they abruptly pull away from the mics. It's the overacting. It's the song. It's the shadows also having fun. It's the fact that it looks like it was filmed in my garage (although I don't have garage).
It's really everything all at once.
It's pure joy.
Here it is - the theme song to Growing Pains, As Long As We've Got Each Other, performed live: