kicks off season 22, it's time to take a look back at some of the most successful singers to ever take the stage on the NBC singing competition!From the surprising Blind Auditions to the emotional and tense live shows, never disappoints when it comes to powerhouse performances, and so it's no surprise that some of the biggest contestants have gone on to find success on the charts and at the GRAMMYs.Ahead of his 22nd season, OG coach Blake Shelton even took a moment to marvel to ET about the «unbelievable» level of talent that singers always bring to the show. John Legend agreed, noting that «everybody's got really good team members» in season 22, making for some «tough» competition.