The performance came as NFL players, coaches and singers appeared in a united front against President Trump.
A singer who took a knee after singing the national anthem at the Tennessee Titans game Sunday says she knows she's probably lost some fans.
"It was a decision I made in that moment before I went on," the former Voice contestant, Meghan Linsey, told Inside Edition Monday.
Read: WWII Vet, 97, Takes Knee in Support of NFL Protests: 'Those Kids Have Every Right to Protest'
Ahead of her performance prior to the Titans-Seattle Seahawks game in Nashville, Linsey realized "this is something I need to do, I need to make a stand," she said.
The teams stayed in the locker room during her performance. After singing, she took to one knee.
The reaction to her decision has been split, she said.
"I feel like I've maybe lost some fans and I've maybe gained some fans," she said. "I was just trying to do the thing that I felt was right to do."
But Linsey wasn't alone: Another national anthem singer, Rico LaVelle, took a knee and raised his fist at the Lions-Falcons game in Detroit.
Every NFL game saw players, coaches and owners kneeling or linking their arms in solidarity after President Trump attacked protesting NFL players during a rally in Alabama Friday.
Players — starting last year with former San Francisco 49ers quarterback Colin Kaepernick — have been kneeling to protest racial injustice.
Trump said team owners should respond to the players by saying, "Get that son of a b**** off the field right now, he's fired. He's fired!"
Read: President Trump Rescinds Stephen Curry's Invitation to White House
Even superstar quarterback Tom Brady, a friend of the president, appeared to sympathize with those protesting.
Speaking Monday morning on Kirk & Callahan, a Boston sports radio show, Brady said: "I certainly disagree with what [Trump] said. I thought it was just divisive."
But it appears some fans are agreeing with the president. At Gillette Stadium, boos were heard as Patriots players took a knee Sunday.
Another fan decided to burn his Pittsburgh Steelers merchandise in a video shared online.
When the Buffalo Bills joined the national anthem protest, a stadium worker said he quit on the spot. A photo showing him leaving the stadium has gone viral.
"I took off my shirt, threw my Bills hat on the ground, walked out," Erich Nikischer, who's worked for the Bills for 30 years, told Inside Edition.
Now the protests are spreading beyond the NFL. On Sunday night, singer Pharrell Williams took a knee at a concert held to honor the victims of the protest in Charlottesville, Va., last month.
Watch: Former MLB Player Who's Now a Cop Leads School in a Cheer
