VIDEO : Shania Twain Will Be Key Adviser On 'The Voice' For Top 12 Artists

Last Thursday NBC revealed that the music superstar will join the reality singing competition as key adviser on the April 24 live telecast. According to a network press release, Shania is set to guide the Top 12 artists who will be revealed through real-time voting during the live playoff rounds airing this week. The Canada native is the top-selling female country artist of all time, with more than 100 million global album sales.