21. Petra Ecclestone and James Stunt - 2011
Estimated Cost: $20 million
Can you imagine spending over $500,000 on your wedding venue alone? That was the case for Petra Ecclestone, daughter of billionaire Bernie Ecclestone. They shut down a small Medieval town in Italy for the occasion, where there was $6,000 champagne and a performance by acrobats even. Petra's Vera Wang dress cost an impressive $1.3 million.