Elvis Costello out of tune as talk-show host (Reuters via Yahoo! News)

To warp a saying -- those who can do, and those who can't, interview them. The thing is, Elvis Costello, host of "Spectacle," can do and has done since 1977. Since then he's been a punk-pop icon, has played with Elvis Presley's sidemen and dabbled in both classical and jazz, among other things.

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