Music
WENN
The singer, currently on the North American leg of her 'The Circus: Starring Britney Spears' tour, has allegedly been forced to leave the stage and vomit after becoming dizzy and nauseous.
"The choreography is insane - it's so fast it is really taking its toll on her," a source told The Mirror.
"There is one move during 'Touch Of My Hand', where two guys dangle from the ceiling and pick her up upside down, which is really getting to her.
"She spins around for nearly five minutes some nights. The blood rushes to her head and when she gets down she complains of nausea and dizziness.
"There have been a couple of times when she ran off stage and vomited. She's asked if it can be changed."
Spears begins her mini-residency at London's O2 arena on June 3 and plays a one-off show in Manchester on June 17.
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