Song from Paddys Pub

I Like Life at Paddy's Pub - YouTube - is the original song I am referencing.

I remember hearing an awesome version of that song on THC, but I cannot find it anywhere. I watched that episode of Always Sunny recently and all I could hear was the Higherside version, especially the end when he hits that high note. What's the deal with that song? Anyone remember which episodes of THC it was on? Why is it not on the songs list for plus bonus content? It was great, bring that one back.