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Kelly Clarkson ’s keeping the show rolling after the tragic death of ex-hubby Brandon Blackstock -- TMZ’s confirmed she’s heading back to "The Voice" as a coach.

We’re told Kelly skipped one taping for Season 29 of NBC’s 'Battle of the Champions' earlier this month -- coming right after the heartbreaking news -- but Jennifer Hudson stepped in during rehearsals for the battle rounds. Getty

Kelly’s reuniting with fellow champ coaches Adam Levine and John Legend -- and get this, the show’s cranking out two cycles at the same time.

As for the other run, Season 28’s got a stacked lineup too … with Michael Bublé , Niall Horan , Snoop Dogg , and Reba McEntire all returning when it premieres this fall.

Reba’s role was also shaky at first -- si

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