‘Eye of the Tiger’ Singer — LIVE & ACOUSTIC … From Some Dude’s Basement

OK, this is pretty cool … it”s weird … but it”s cool.

Jim Peterik — the original lead singer of the band Survivor — busted out his nicest guitar, and his tightest white pants, and jammed out an acoustic version of “Eye of the Tiger” in a basement … and it was awesome.

It all went down Tuesday night at a home in Chicago, where the guys from “Hardcore Pawn: Chicago” were holding a live chat for their fans.

Jim — who was born in Chicago — stopped by to hang out … and while he was there, the 62-year-old rock legend busted out a rendition of his biggest hit — you know, the song from “Rocky III.”

Now, watch the video … put on your finest track suit … and go run up some stairs.

It”s what Mickey would want …