Mid-Week Mystery Song

I'm still fixating on 69 Love Songs today, so I'll just toss you all a mystery song to enjoy and regret hearing. Whee!

What is the mystery song?

A long song, but a great song!

(You all lucked out because I was originally going to do DJ Jazzy Jeff and the Fresh Prince's "Summertime" but there were so many Summertimes on Rhapsody, that I couldn't track it down. Consider yourself spared!)