Mom Katie Baker Van Urk told Newsweek: "We can't wait for her hair to fill out one day, but honestly, we're kind of obsessed ...

Rather than his signature mullet and mustache ... I didn’t like my long hair anymore, so I shaved it off” — an announcement that was met with a combination of cheers and boos.

Since bursting onto the country scene, Shelton’s hair, for better or worse ... singer’s most notable hairdo was the mullet.