Drunken Chelsea Clinton staggers out of a nightspot-and collapses.Chelsea, 22 year old daughter of ex-President Bill Clinton, had to be CARRIED (into her car) by her American boyfriend Ian Klaus, 22.She then slumped into the back of the car.The pair, both students at Oxford University, had been boozing with pals at the Embassy Club in London's Mayfair.An onlooker said: 'Chelsea couldn't even stand or speak.'She was wasted.