The 34-year-old singer, who replaced Cee Lo Green on this season's judging panel, attracted some unwanted attention from an unidentified woman in the audience, who was kicked out of the studio after constantly screaming his name and loudly blowing a whistle at him, reported New York Post.
The fan was initially asked to calm down but a security guard removed her from the NBC studio in Burbank, California after she refused to stop.
"The woman was blowing her whistle and yelling Usher's name. The security people escorted her out to the street," a source said.
This season's panel of judges also includes Adam Levine, Shakira and country music star Blake Shelton.