It was only a few minutes into last week’s show that two people demonstrated their special gifts in an impressive way. One was contestant Esera Tuaolo (pictured), a member of Blake Shelton’s team who chose to enter the Knockout Round by singing an emotional version of “Superstar” – and almost instantly became one.  The other was Kelly Clarkson, the former American Idol winner who’s just joined the show as a special advisor to all four teams (and will be joining the show in the fall as a judge). She was blown over by Tuaolo in rehearsals, which suggests she’s as strong a judge of talent as she is a vocalist. This season, watch out for Esera. Next season, I predict, watch out for Kelly…