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Star Salute! Celebs Celebrate Presidential Inaugurations

From Beyoncé and Mariah to John Lennon and Frank Sinatra, see which stars honored America's leaders, both past and present

MARC ANTHONY & JENNIFER LOPEZ

After performing a surprise romantic duet at the Jan. 20 Western Inaugural Ball, the former couple shared a laugh with Vice President-elect Joe Biden inside the Walter E. Washington Convention Center. "It's amazing to feel the world changing," J. Lo told PEOPLE.