7 things you didn't know about 'The Voice'

"The Voice" season 15 is just over a month away, so AXS is rolling out a few things you may not know about the hit NBC singing competition. Watch behind the scenes footage of the coaches by playing the video above, then see how well you know "The Voice" before the new season starts on Sept. 24 with these seven fast facts about TV's most popular music show.

1) Its "American Idol" connection

"The Voice" and ABC's "American Idol" might be rivals, but two of the three current "American Idol" judges appeared on "The Voice" first. Lionel Richie was a battle rounds mentor for Team Pharrell during season 8, while Luke Bryan mentored for Team Blake during season 12 and has also appeared as a musical guest. Conversely, current "Voice" coaches Kelly Clarkson and Jennifer Hudson both got their first big exposure on "American Idol."

2) There were once instant eliminations

Forget the Instant Save. During "The Voice" season 2, the show went the completely opposite direction - forcing the coaches to immediately cut one of their contestants during the quarterfinals. The "instant eliminations" were never used or even mentioned again, but there was a time when this show was knocking out singers during its own performance show, as opposed to the multiple second chances contestants have today. Now it's a kinder, gentler "Voice."

3) It's not just winners who get contracts

The big prize for winning "The Voice" is a record deal through Universal Music Group, which is another part of NBC's corporate family at NBCUniversal. But what audiences may have missed is that UMG holds the option to sign more than the winner at the end of each season. After the show's smash hit first year, all four finalists were offered deals, with Javier Colon, Dia Frampton and Vicci Martinez all releasing albums through Universal Republic. 

Related: "The Voice" season 15 to introduce new digital competition

4) Multiple winners have passed on the prize

Along similar lines, several "Voice" winners have turned down Universal's contract. Season 6 winner Josh Kaufman pursued a career on stage and self-released his next album instead. Season 10 winner Alisan Porter signed with Republic, but then walked away when it wasn't the right fit. Finally, season 2 winner Jermaine Paul, who only got two singles out of his contract - actually hasn't released a full album since he appeared on the show back in 2012.

5) The coaches do work with artists after the show

Many "Voice" fans wonder if the coaches support their artists after the season ends, and there have been numerous cases of coaches doing just that. Adam Levine and Blake Shelton appeared on Javier Colon's and Dia Frampton's post-show albums respectively, and have each taken some of their "Voice" contestants out on tour with them in the past, like when Shelton brought Cassadee Pope onstage in Indianapolis in 2013. It's impossible for the coaches to keep in touch with every artist, especially with the show filming two seasons a year, but those are just a few examples of how these superstars still help even after the cameras stop rolling.

6) The show features solo artists and duos

"Voice" viewers have probably forgotten that the show also permits duos, not just solo singers, to audition. That's because there aren't that many duos who appear on the show anymore, and duos haven't advanced that far. In the first season, Elenowen earned themselves a spot on Team Blake but were cut in the battle rounds. In season 9 there were Jubal and Amanda, who likewise lost their battle but got engaged during the show so they won in their own way. Duos are still allowed to audition for "The Voice" so perhaps we'll see more of them in season 15.

7) There was a "Voice" live tour

Music fans know about the "American Idol Live" tour, and NBC tried to do the same for "The Voice" but had no luck. "The Voice Live on Tour" happened first in 2011, then was resurrected in 2014 and presumably neither tour was commercially successful, because it never became a regular occurrence. However, the network is trying again with a fixed show, "The Voice Neon Dreams" in Las Vegas, which has been pushed back from a summer 2018 opening to spring 2019.

"The Voice" season 14 premieres Monday, Sept. 24 at 8 p.m. on NBC.