Blake Shelton to be guest picker on ESPN's 'College GameDay' for Oklahoma-Tennessee Country music star Blake Shelton will serve as the celebrity guest picker on ESPN's 'College GameDay' for Oklahoma's game against Tennessee on Saturday: Original Source: https://sports.yahoo.com/blake-shelton-guest-picker-espns-174141920.html Previous article: Tale of the Tape: Auburn vs. Arkansas Prev Next article: Michigan secondary preparing for big challenge against USC passing game Next