Following former panelist Paula Abdul's shocking departure from the hit series earlier this month over money issues, bosses on the show have tried to fill her place with a string of star guests.
And now, How I Met Your Mother actor Harris can add his name to the growing list -- despite never embarking on a music chart career.
He judged wannabe superstars at an audition in Dallas on Tuesday, according to Access Hollywood.
The star, who is set to host this year's Emmy awards, has previously sung in Broadway productions of Sweeney Todd and Cabaret.
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