Underwood's performance experienced technical difficulties, leading her to sing a cappella. She asked the attendees to join in. "You know the words," she said. Michaels Wolflick p

Crew members on the set of American Idol are tip-toeing around judge Carrie Underwood. After Carrie’s performance for President Trump’s inauguration in January, things have been “tense” on set at American Idol.

American Idol showrunner Megan Michaels Wolflick weighed in on Carrie Underwood’s performance on President Donald Trump’s Inauguration Day in January, which drew attention and mixed reactions among some social media commenters.