Sammy Hagar and R.E.O. Speedwagon's Kevin Cronin appeared on stage together in St. Louis last Saturday. Both musicians were on hand for a reunion of classic rock DJ's from the area at the Ameristar Casino. Hagar and Cronin came on stage to talk briefly about how crucial the support of St. Louis was to their careers. Then Hagar and The Wabos did a Montrose medley followed by "Red." Cronin joined in the vocals for "I Can’t Drive 55" and then took the lead on a version of REO's "Roll With the Changes." Check out a video of the performance below.