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The Chicago power-pop band OK Go became a viral Internet sensation earlier this year when two homemade videos - including one of a choreographed treadmill dance routine - leaked onto the Internet. But before that, they were (beleive it or not) a Public Radio favorite. Today, the band talks about virtual fame and plays live in the studio. Also: the indie-rock duo Mates of State first came to public attention when they held a contest for fans to create their own video for the first track on their EP: "Goods (All In Your Head)." The winning entry became the official video for the song, and was aired on MTV. The wife-and-husband duo performs live in the studio. And finally: We find out why members of Procol Harum are in court this week over the authorship of their 1967 hit "A Whiter Shade of Pale."