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.

 From bow-adorned hairdos (an extension of this year's 'bow down to the bow' trend) to Rihanna-approved elevated hair buns ... back length long is a foolproof way of rocking a mullet.