The "Toxic" singer is currently on her overseas Piece of Me tour. During an interview with an Israeli TV show, Spears was asked if she sings live during her concerts.
"I'm glad you’re addressing this question because it’s really funny," Spears replied. "A lot of people think that I don’t sing live. I usually, because I’m dancing so much, I do have a little bit of playback, but there’s a mixture of my voice and the playback."
"It really pisses me off because I am busting my ass out there and singing at the same time and nobody ever really gives me credit for it, you know?" she added.
Spears has faced lip-syncing accusations over the years. Her 2007 MTV VMA performance of "Gimme More" came into question when it appeared she was lip-syncing. In 2014, fans noticed that when Britney was singing "Perfume" during her Las Vegas residency show, the track sounded a lot like Sia, who co-wrote the song, instead of Spears.