John Legend And Blake Shelton Reveal Taylor Swift Will Be Mega Mentor On ‘The Voice’

John Legend and Blake Shelton dropped a teaser clip on their Instagram account, revealing the mega star who would be joining them as a mega mentor for “The Voice”: Taylor Swift! The “You Need to Calm Down” singer will join coaches Kelly Clarkson, Gwen Stefani, Blake and John for Season 17’s Knockout Rounds.