November 18, 2006 - Handout/Getty Images Entertainment more pics like this »
7. Tom Cruise and Katie Holmes - 2006

Estimated Cost: $3.5 million

These two got hitched in Italy at the Odescalchi Castle with 300 bottles of fancy red wine, a performance by Andrea Bocelli, and a slew of famous guests. The wedding festivities lasted three days and were clearly fit for celeb royalty.