The performance was ridiculed by many critics and the book claims Britney - who was going through a messy divorce and custody battle with ex-husband Kevin Federline - was in tears for 45 minutes after leaving the stage.

When the mother-of-two did appear on stage - dressed in an unflattering black underwear set and fishnet tights, after reportedly refusing to wear the agreed more flattering one-piece - she looked dazed, forgot some of the lyrics to her song 'Gimme More' and barely joined in with the dance routines.

When Britney told Ken to leave, her staff began desperately searching for other hair extensions - which were needed because her natural locks were still very short - and they had to quickly find some from her hotel's salon. Her preparations descended into chaos when Britney allegedly refused to let celebrity hairstylist Ken Paves attach her hair extensions. She decided it was a good idea to start drinking tequila shots to calm her nerves - one after the other.'īritney's fragile mental state was also reportedly tested when her ex-boyfriend Justin Timberlake came into her dressing room to wish her luck.ĭennis revealed in the book: 'Justin was cool and couldn't have been friendlier, but that wigged her out more.' Hours before the show, her anxieties raged. In his new book 'Britney: Inside the Dream', writer Steve Dennis claims: 'Britney herself managed to ruin the most important performance of her life. However, insiders have now revealed she wasn't mentally ready to perform and was drunk when she went out on stage. The 'Toxic' singer - who had months earlier entered rehab after shaving her head - had been planning her routine at the prestigious event for months to prove to the world she had fully recovered from her personal problems. Britney Spears allegedly binged on tequila shots moments before her disastrous performance at the 2007 MTV Video Music Awards.

Britney meltdown