Michael "P. S." Hayes (The PS stood, supposedly, for "purely sexy") was 1/3 of the wrestling tag team known as the Fabulous Freebirds, who were one of the most respected, reviled, and revered teams in the wrestling business in the 80's. Hayes, however, was also a bit of a visionary. His team was one of the first to use rock music for an entrance theme, and Hayes recorded what would be their seminal theme song, "Badstreet, USA", about the team's "hometown" of Atlanta.
4 years later, while working for Bill Watts' Universal Wrestling Federation (UWF), Hayes went back to the recording studio and recorded a cover of Thin Lizzy's "The Boys Are Back in Town". The video premiered on UWF television, as you can tell from the teaser graphic at the end of the following clip, promoting a tag match Hayes would compete in later in the broadcast.
When the UWF was bought out by a rival promoter, Hayes returned to World Class Championship Wrestling in Texas. I can recall him actually doing some singing down there, too, most notably, a cover of Otis Redding's "(Sittin' On) The Dock of the Bay". At the time, World Class had begun airing on MSG Network, which back then was a premium channel, and in those days, you could tune in to a scrambled picture and just enjoy the audio. These days, Hayes works for WWE as one of its head writers, but he's also been known to put his Badstreet Band back together for the occasional gig.
Here's "The Boys Are Back in Town", uploaded to YouTube by Vicvenom: