Britney Spears Loses Hair In Latest Concert Oops

At one of her latest ‘Circus’ shows, Britney Spears loses a chunk of her hair weave, extension or whatever it is, as a suspended dancer pulls her up into the air with him.

You can see it in the video above.

Meanwhile, insiders are claiming the pop star struggling with her energetic dance routines and the high-energy dance routines are leaving her dizzy and nauseous:

A source tells Britain’s The Mirror:

“The choreography is insane – it’s so fast it is really taking its toll on her. There is one move during (the song) 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.”