has been drinking energy drinks nonstop - which can keep her awake for up to three consecutive days, reports. The pop icon, 41, who reportedly has had a , is said to over caffeinate herself with Red Bull, Celsius, coffee, and dandelion tea 'nonstop'.Celebrity Rehab host Dr. Drew Pinksy told the publication with mental illnesses crave the 'high' that caffeinated drinks provide.
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