St Patrick's Day - Guinness ads

The song in the ad is Kiss my Irish ass by The Keltic Cowboys
LYRICS
Oh me dad, he'd be drunk on the lawn,
Yelling and screaming like he do
But sometimes my old man felt what he was feeling,
Sometimes Mr. Mackey spoke the truth
We're as stubborn as mules
With our blood on fire
When we ain't at Sunday mass
We'll look any man straight in his eyes and say
Kiss my Irish ass!
You better kiss my Irish ass!