The packed-out fans gathered at The O2 arena in London for her 'Piece Of Me' concert on Friday night were left scratching their heads during the show.
When asking the crowd to cheer more loudly on both sides of the venue she appeared to adopt a very phony accent.
Fans posted clips on Instagram where she could be heard saying: "One, two, three, what the hell is wrong with you let's try it again please, Jesus Christ!"
The 'Toxic' singer has been known to adopt accents before while on tour but she seems particularly fond of trying the British one at present.
RadarOnline.com previously reported how she had implemented strict rules on her tour but these obviously do not apply to doing fake accents.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.