Whether or not you believe the idiom 'third time's a charm' to be valid or a mere superstition, in this marriage it's proven to be true.

In his third attempt at wedlock, rocker Rod Stewart hit the jackpot and shacked up with the beautiful Penny Lancaster -- now Penny Lancaster-Stewart.

A former fitness trainer, photographer and model for the designer Ultimo, Lancaster and Stewart married on June 16, 2007, in a way that only the 'Do Ya Think I'm Sexy,' and 'Tonight's The Night [Gonna Be Alright]' singer can deliver, aboard a yacht off the coast of Italy.

Stewart just released his autobiography, titled, 'Rod: The Autobiography.'