Fan sings with Chicago at Ravinia

August 25, 2013 7:44:21 PM PDT
One generous fan of the band Chicago got to sing with them Sunday night during their sold out concert at Ravinia.

Rick Rosen made the winning bid to the Ron and Vicki Santo Diabetic Alert Dog Foundation for the chance to sing with Chicago.

The organization educates people about diabetic alert dogs and raises money to help people buy one of the specially trained dogs.