It seems the sure way to boost any career. Make a sex tape. Some of these sex tapes are highly edited and it appears they haven't been 'leaked' so much as 'created and hawked'. Scary to think the Octomom made one after having 8 babies.
One of the most well-known sex tapes ever is that of Paris Hilton and Rick Salomon. It was entitled quite aptly '1 Night in Paris'! The tape is shot in night vision which kind of adds to its seedy appeal. The video later went on to win an AVN Award for most rented video. In those days (2003) sex tapes were quite hard to get hold of and seemed very titillating, these days there are so many jumping on the bandwagon most people have lost interest and are perhaps making their own sex-tapes!
For more info and pics: http://baklol.com/baks/celebs/Celebrities-who-made--ex-tapes-_1508/Verne-Troyer-_18669