This Fourth of July saw several celebrities sharing their festive celebrations on social media. Katy Perry struck a Rosie the Riveter pose in a patriotic bikini while promoting her new single 'Woman's World'. MMA star Paige VanZant celebrated with a red swimsuit and Coca-Cola, delighting her Instagram followers. Leah McSweeney, formerly of 'Real Housewives of New York,' posed nude with an American flag for a photoshoot, revealing her recent breakup and promoting her new sober dating app, Club Pillar. Meanwhile, Lisa Rinna continued her decade-long tradition by posting a throwback bikini photo, encouraging fans to enjoy hot dogs.