An absolutely terrible day for those of us who love dancey soul music: As Alex mentioned in Good Morning, News, disco diva Donna Summer has died of cancer at age 63, along with one of the "go-go" masters of the mid-'70s Chuck Brown, who passed away at age 75 due to complications from sepsis. I've spent much of my life dancing to these guys, and you can believe it when I say they'll be missed. Here are my fave vids from each.