1. MARIA SHARAPOVA

If Sharapova is as outspoken in the bedroom as she is on the court, her fiance, Sasha Vujacic, has probably invested in some earplugs already. The guttural battle cry, which sounds like a cross between a cat in heat and a chainsaw, has been recorded at 103.2 decibels. To put that in perspective, her previous record of 102.7 is the equivalent of an ambulance siren.