I have to go with Dexys Midnight Runners, it was a classic song that is burned in my brain as part of my youth. It's a great song that I'll never get tired of hearing. Now Iron Horse was a clever twist on the GNR song, a bunch of old guys (damn, I'm one too now) doing a great cover! Cute blonde in the video too...
Michael Jackson got too damn weird over his career, I liked him best back when he was black with the Thriller album. Then there was the trial... And his propofol death... Everything he did he did weird. Man in the Mirror was a good song though and introspective. They did a good job covering it a cappella style.
Some great picks you found! Great job! Have some !DUO