Frances and Marlow Cowan's inpromptu piano performance at the Mayo Clinic back in September of 2008 went viral on YouTube, but it wasn't until last week that they returned for a much overdue encore. The charming couple from Iowa's step toward online stardom started during a medical visit to the Mayo.

Marlow, who was 90 at the time, had come for a physical. "I'd had a physical in the Army and that took about 15 minutes," Marlow said with a smile.

KARE 11, by Julie Nelson, 3/2/2010

Additional coverage:

Star Tribune

Sturgis Journal

WISH TV

Tags: Cowans, piano, Social Media, Youtube