It's fun to debate with your friends the merits of some of music's biggest artists, but a new chart from ConcertHotels.com attempts to quantify what makes a great singer, and they rank Guns N' Roses frontman Axl Rose at the top of their list.

The list is primarily focused on the singer's vocal range, and Rose, with his five-octave pipes, heads up the list. The chart lists Rose as going from an F1 on 'There Was a Time' all the way to B flat 6 he hit on 'Ain't It Fun,' putting him right at the top with such pop stars as Mariah Carey and Prince. But while Rose had the largest vocal range, he fell short of Carey, Prince and Christina Aguilera for hitting a high note on a song.

For those ready to scream about the range of such high-reaching metal frontmen as Rob Halford and Ronnie James Dio, it should be noted that this is a more mainstream-leaning list, with only Rose, Steven Tyler, Robert Plant, Iggy Pop and Kurt Cobain truly representing the harder side of rock.

As for Tyler, he was next in line when it came to rock vocalists, starting at D2 on 'St. John' and reaching up to an E6 on 'Crazy.' The rocker with the most limited range was Cobain, who registered a C sharp 2 on 'Low Rider' and an F5 on 'Blew.' But that was still way ahead of the most minimal range of country superstar Luke Bryan, who's songs register between an A2 and A4.

To check out the full list of artist vocal ranges compiled, visit the Concert Hotels chart at this location. And to see Axl Rose in action, catch Guns N' Roses on their 2014 Las Vegas residency, which kicks off tomorrow. Tickets are available here.