Before he was a mentor on 'The Voice,' Blake Shelton was part of NBC's 'Clash of the Choirs,' a short-lived singing competition show in which he assembled a choir to compete against Nick Lachey and a few other famous singers. But before that, Shelton was part of a country-themed television series that launched the careers of Chris Young, and his wife Miranda Lambert.

Shelton was a judge on the fifth season of 'Nashville Star' in 2007. Along with Randy Owen and Anastasia Brown, he congratulated Angela Hacker on her win. Things didn't end up working out for Hacker, but two others from that season have enjoyed success. Whitney Duncan placed fifth, and 'Merry Go 'Round' singer Kacey Musgraves placed seventh.

NBC would pick up the show in season six, and later employ Shelton for 'The Voice.' While he was never a contestant, Shelton may be the one who benefited most from a series that struggled to compete with the flashier 'American Idol.'

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