Life on Mars 4/1/09 -- Song Question

“Life is a Rock” – Series finale. Sam finally finds out what’s going on and how he got back to 1973. But here’s my question; does anyone have any idea what song was being played at the beginning? All I got were references to both David Bowie and Edgar Winter so I was hoping someone could help me.
Thanks in advance!

Reunion’s “Life is a Rock (But The radio Rolls Me)”

Wow! First reply. That’s it Sean. Thanks!!

I knew it right away. It’s always been one of my favorite early '70s pop songs.