It's Fat Tuesday, and that means the Mardi Gras party is under way! With all the Carnival celebrations around the world, there are plenty of opportunities for stars to get wild. Kim Kardashian and Kanye West are touring Brazil just in time for the festivities, as are couple Megan Fox and Brian Austin Green. Gisele Bundchen got in on the action in Rio in 2011 while Jennifer Lopez, boyfriend Casper Smart and others have participated in the festival fun from Brazil to New Orleans in the past as well. Click through to get the party started!