St. Jude Radiothon Highlights: Gavin Howard’s Donation from St. Jude Shirt Sales [VIDEO]

Gavin Howard has been designing t-shirts for the past four years for the St. Jude Radiothon.

When he came in to announce what he'd raised for St. Jude Children's Research Hospital through sales of the shirts he'd designed, he brought along the whole family--his mom and dad, Will and Jenny, and his brothers, Grant and Grayson.