Matt O'Donnell on the drums at Musikfest!

BETHLEHEM, Pa. (WPVI) -- Musikfest is entering its final few days, but Friday night, there was a very special guest providing the back beat, on stage with the Sofa Kings.

That is the incomparable Matt O'Donnell, sitting in on drums tonight at Musikfest.

Not only can Matt keep the rhythm, he does it all barefoot.

Musikfest runs through Sunday.