Meet The Vocal Coach Who Helped Katy Perry Sing Live At The Super Bowl
Pop stars like Katy Perry, Ariana Grande, and Meghan Trainor go to great lengths to protect their voices — and their livelihood — amid grueling tour schedules and high-pressure performances (Super Bowl, anyone?). "Vocal life coach" Eric Vetro, whose major heart and minor ego have survived 30 years in Hollywood, keeps their spirits and notes high.