Vocal Coach Eric Vetro's New Course to 'Improve' Your Voice Earned Kristin Chenoweth's Stamp of Approval (Exclusive)

• Eric Vetro, a go-to vocal coach to superstars, is sharing his skills in a new BBC Maestro course
• His students Sabrina Carpenter, John Legend and Marissa Jaret Winokur appear in the course and offer advice to students
• Vetro tells PEOPLE the course has already received Kristin Chenoweth's stamp of approval

Eric Vetro has given vocal lessons to Ariana Grande, Angelina Jolie, Katy Perry, Pink, Rosalía, Renée Zellweger, Emma Stone, Ryan Gosling and other superstars. Now, anyone can benefit from his knowledge and wisdom in the comfort of their own homes.

The 68-year-old vocal coach recently offered up his skills for BBC Maestro's "Sing Like the Stars" course, an eight-hour series of videos featuring advice from his star students Sabrina Carpenter, John Legend and Marissa Jaret Winokur — and for $89, it's an unbelievable value.

"As a matter of fact, even Kristin Chenoweth texted me and said, 'I would've loved this when I was very young,'" Vetro tells PEOPLE from his Los Angeles home studio.

The course came about after the BBC Maestro team contacted Vetro, who immediately agreed to participate upon learning Mark Ronson, Tim Rice and Bill Lawrence were among the previous instructors. "I went, 'Stop. You had me at Mark Ronson,'" he recalls. "I was really happy and excited to do it."

In contrast to his usual slate of celebrity students, Vetro appreciates the opportunity to share his teachings with a broader audience. "A lot of people, they either don't have enough money to go take lessons, or there's no voice teacher they have access to," he says.

"They might not have the time to go take lessons because they're working all day, or they're taking care of their children. But either late at night or early in the morning, this way they can do it. They can do it in private. They don't have to worry about anyone listening to them," adds Vetro. "I just thought, 'You know, this could be really useful for people.'"

At one point during the process, the BBC Maestro team asked if he'd be able to get Carpenter to appear as a guest for a Q&A session with the on-camera students. Initially, he thought there was no chance the "Espresso" singer would have time.

"I wasn't even going to ask her, and then I thought, 'Well, I have known her since she was 12 years old. I love her. We have a great relationship,'" explains Vetro, who ultimately reached out.

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"She said, 'I have that time off on Sunday.' I hated taking her time off, but she seemed willing and happy to do it," he adds. "Even up until she walked through the door, I was like, 'How can she do this? She's exhausted. She's got so much going on,' and I was so grateful to her."

Legend also hosts a Q&A with students in the course, while Winokur speaks about her time as Tracy Turnblad in Hairspray on Broadway in a section about stepping into a character's specific voice. Needless to say, anyone who takes the course is getting a well-rounded vocal education.

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About a month after the BBC Maestro course was released, Vetro has already heard feedback from satisfied takers. "I just ran into someone last night at a concert. Someone came up to me and said, 'I love your course. I'm a singer, and I'm getting so much out of it,'" he explains. "That felt good to hear."

Complete with over 100 vocal exercises for various ranges as well as dozens of pages of course notes to accompany the videos, Vetro's course is the longest of the BBC Maestro series to date. "We worked really hard on it," he says.

Most importantly, the vocal coach doesn't want anyone to feel too intimidated to take his course. "It's for whether your aspirations are to be a pop star, or a musical theater star, or to just sing better at karaoke, or if you're a songwriter," says Vetro. "I just want it to be for everybody who wants to improve their voice."