The Ramparts Chamber Choir Dublin have been honing their craft for a few years now but they've really burst onto the scene in recent weeks.
Firstly they treated us to a rousing barbershop cover of Fr Ted's My Lovely Horse in a performance which probably would actually do better at the Eurovision than most of the tripe we usually send. And now they're back again with their coup de grâce!
Yes, you guessed it - a cover of the Be Sharps' Baby on Board. Not only that but sang on rooftop, in the way God intended.
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*Stands up and applauds*
You can catch the lads on BBC One in Pitch Battle on the 15th of July. Well worth a watch!