Chris Willman Senior Music Writer and Chief Music Critic At his Hollywood Walk of Fame star ceremony Friday, Blake Shelton was both celebrated and shamed by three guest speakers that have loomed large in his life over the last dozen years, as “The Voice” host Carson Daly thoroughly roasted him, wife Gwen Stefani waxed lovestruck (still), and former fellow judge Adam Levine split the difference. Shelton did not refrain from comic comments of his own. He mentioned that, as an aspiring singer from Oklahoma, getting a star on the Walk of Fame had not been primary among his career goals. “It was just never on my radar,” he told the assembled crowd on Hollywood Blvd. “I had a dream of being a country singer and hearing myself on the radio one day, and I never, ever thought that that path would lead me here. … So, like, this is shocking to me that this even happened. … I’ve been telling people for the last few weeks that I’m getting a Hollywood Square. ”