Radio.com: Tell me about why you decided to put out The 21 Project the way you did - showing each song a studio version, acoustic version and live version.

Hunter: Well, I really wanted to do something fun with some of the songs from this summer, and since they weren't really created or released as part of a full on record, I felt like they needed to kind of have their own moment or their own chapter of sorts. But since it was only 7 songs we decided on I wanted to give the fans more than that, so I thought it would be cool to finally put out a project with a live portion and an acoustic portion, especially seeing as how the fans have all seen how the band and I always love doing the weird acoustic versions of things. It was such a blast to put together and I can't wait to get the fans take on how it came out.

Radio.com: How do you classify this in your discography - is it an album, is it an EP -- or do such terms even matter anymore in 2015?

Hunter: Well you make a great point. Number one, it's really neither a record or an EP which is exactly why I wanted to do it this way because number two, I couldn't agree with you more that there are so many more options in with how we release music now and that really energizes me and makes me wonder what could be next.

Radio.com: Tell me about writing the song "21." What was great about being 21-years-old?