David Grusch says the government has been lying to Americans for decades about what it has really found.
Social media clips showed a swaying group of lights in the clouds as Swift performed in Tampa last week.
It's not clear what China could have learned from a spy balloon that it wouldn't have already known from its armada of satellites.
There is "no indication" that these high-altitude objects have any ties to alien life, White House press secretary Karine Jean-Pierre clarified.
"I'm not gonna categorize them as balloons," said Gen. Glen VanHerck, commander of NORAD. "We're calling them 'objects' for a reason."
Rep. Tim Burchett said "America is ready" for the truth about UFOs.
Many of the reports concern unidentified objects flying in sensitive military airspace.
The singer and "Voice" coach appeared to be dead serious and said she was normally a skeptic.
The footage has not yet been explained. At least, not publicly.