A "Grandma Drummer" strolls into a small-town shop every few months and jams out.

The "Grandma Drummer"comes into a shop, sits down at a drum kit, and starts jamming...hard. The Wisconsin shop has been meaning to film her...and finally they did.

The staff in the VIDECoalition Drum Shop in La Crosse, Wis., knows the "Grandma Drummer" her as "Mary."

Store manager Dustin Hacksworth told press that the "grandma drummer" shows up every two months or so to wail away on their kit.

"Every time she comes in, we think, 'Man, we should video tape this' and we finally did," Hackworth said to press.

On Thursday, the shop posted a clip of the "Grandma Drummer" on YouTube- and it quickly went viral, garnering a whopping 100,000 hits within two days.

Grandma Drummer's identity has been revealed. The mystery was solved after a few days...the feisty lady is Mary Hvizda of Onalaska, Wis. She's played in several bands since she was 16...and she's still kicking strong on the kickdrum.