Britney Spears 'over-caffeinates herself - causing star to stay awake for up to 3 days at a time'

Britney Spears Amped Up on Caffeine, Coffee, Red Bull, Celsius

Britney Spears' planned tell-all 'will address her brief 2003 fling with Colin Farrell'

Britney Spears' forthcoming book will address her brief 2003 fling with Colin Farrell