July 28, 2009 at 09:42 PM EDT

Colbie Caillat, Esmee Denters, and Marie Digby, the girl who shot to fame through her rendition of Rihanna’s “Umbrella,” were all snapped up by big labels after building themselves up organically on Myspace or YouTube (though Digby was later outed as a major-label signing before then). So why is it that Kina Grannis, also a huge YouTube phenom, is not officially signed?

You may remember her as the girl who won the national Doritos “Crash the Super Bowl” challenge in 2008, when the music video for her song “Message From Your Heart” premiered on the screens of millions around the world. She beat out thousands of others, as judged by will.i.am and a group of  A&R executives.

The 23-year-old Southern Californian already has over 93,000 subscribers on her official YouTube channel, and millions of combined page views for dozens of covers and originals — not to mention songwriting ability, chops, and a lucid, gritty voice. Here’s one of her latest videos, a beautiful remake of Fleet Foxes’ “White Winter Hymnal.”

What do you think, Music-Mixers? Do you also think this young woman should have signed already? Is she the next big thing?

More from EW’s Music Mix:

Tim Buckley: Exclusive track

Adam Duritz talks with the Music Mix

Friendly Fires: Mercury-nomiated Brit rockers debut video for ‘Kiss of Life’

Florence and the Machine, Kasabian lead Mercury Prize short list

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