The night Frank Sinatra told Glen Campbell to sing "My Way" on The Tonight Show, every person in that studio expected a polite performance — and a quiet embarrassment. Behind the country hits and the television smile lived a Wrecking Crew genius whose hands had shaped Frank's own recordings, yet the world still saw only the TV star. Four minutes later, Frank Sinatra was leaning forward in his chair with his famous confidence completely gone — and Glen Campbell was the reason. Tell us in the comments what Glen Campbell meant to you — not the Rhinestone Cowboy, but the man nobody saw coming.