The Voice is currently airing its seventh season on NBC, yet there has never been a standout star once each season ends.

Who Are The Frontrunners In The Top 12 Of 'The Voice'?

Why is that the case? A source told Hollywood Life on Wednesday that the coaches on The Voice are the big stars.

The Voice is currently bringing in 11 million viewers per episode in its seventh season and in the past it has done well too in terms of viewers, yet the show has yet to produce a mega-superstar to join the ranks of The X Factor UK and USA alumni made up of One Direction, Fifth Harmony, Little Mix, Olly Murs and more. Plus, even American Idol is still going strong and has produced some major success stories such as Carrie Underwood and Kelly Clarkson.

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The main focus of The Voice though appears to be the coaches since they're household names. Adam Levine, Blake Shelton, Gwen Stefani, Pharrell Williams and even the previous coaches are all major names in the music industry. Even the advisors brought in each season to mentor the contestants are major names in the industry. On the current season of The Voice, Taylor Swift was among the advisors. You cannot get much bigger than her.

Hollywood Life's source said, "The reason everyone really thinks that the show is working is [executive producer] Mark Burnett knows how to make a television show, so he makes it an award show every week."

It's unfortunate that Javier Colon (Season 1 winner), Dia Frampton (Season 1 runner-up), Danielle Bradbery (Season 4 winner) and any others who have placed within the Top 3, haven't received the same kind of recognition contestants on the other singing competitions receive.

But the source that spoke to Hollywood Life is hopeful. "It would be great to get a star out of one of the winners, but it is all about the show."

Remember to tune in to The Voice on Mondays and Tuesdays on NBC at 8 p.m. ET.

Below you can catch the promo for those who made it into the Top 12 on Nov. 12.