'Mon the Burgh! was penned by fan Peter Gillan to the tune of the Hokey Cokey to help rally the fans as the team heads for the cup final tie.
As the Honest Toun turns football crazy, scores of coaches are being booked to take fans from East Lothian to the final at Rugby Park in Kilmarnock on May 29 - and each of them will be equipped with a CD of the song so they can get practising.
Mr Gillan, who enlisted the help of fellow members of his band Yard of Ale for the recording, said: "I'm at most of the games, work permitting, so I promised that if we did get to the final that I'd go off and do a proper song - and in football terms, that is a proper song!
"We're all delighted, especially having followed it through the semi-final, which nobody expected us to win. There are lots of coaches going, so we'll make sure every one of those has a copy so people can sing on the way there. We're going to make sure the match day announcer is furnished with a copy and we'll have everybody singing - maybe the Auchinleck Talbot fans will even join in, you never know!"
It is the first time in living memory that the team has been in the final, with supporters hoping to see a victory on a par with the 3-0 win against Arniston Rangers at Tynecastle in 1923, under its former name Musselburgh Bruntonians.
Ryan Kelly, who runs the club website, said: "I think the whole town's turning out. It's amazing for us, it's the equivalent of Hibs winning the Scottish cup."
Manager David McGlynn said he was thrilled by the fans' response: "We're hoping to get 5000 there on the day. There's a lot of preparation going on behind the scenes to get new strips, we're trying to get sponsorship from local businesses. It's obviously a new experience for us, but we have something we've got to look at as the high point of our footballing career. Everywhere you go everyone asks you questions about the cup final and you've got to play it down because you don't want to get the players too excited."
While the players might be under manager's orders to play it cool, the fans are being given the go-ahead to give it their all. With the song available on our website and getting an airing on local radio, they are being encouraged to learn the lyrics so they can back the team.
Mr McGlynn said: "It's getting a lot of coverage now and it's a catchy wee tune, so hopefully a lot of them will be singing it on the day."
To book a coach seat to the final, call Mr Kelly on 07743 927 878.