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Katy Perry

Dennis Van Tine/Sipa USA via AP Images

It's the final countdown! 

There's approximately 48 hours left in the presidential race, and Katy Perryis doing her part in encouraging voters to hit the pools come Nov. 8. The pop sensation took the stage in Philadelphia Saturday evening, where she performed her hit song "Roar" in support of Hillary Clinton

Perry rocked her finest patriotic garb, a sequined red, white and blue American Flag dress paired with electric blue leggings and a matching coat with "I'm with Madam President" scrolled on the back. 

Ahead of joining the Democratic nominee, Perry walked out to Janet Jackson's "Nasty Woman," a tongue-in-cheek nod to the now-viral comments Donald Trumpmade to Clinton during the presidential debates. 

Debra Messing, Bob Casey, Katy Perry, Hillary Clinton Campaign

Justin Sullivan/Getty Images

Debra Messing was also present to lend a familiar face to Clinton's cause, the latest in a string of celebs that have saddled up to support her journey to the White House. 

On Friday, Beyoncémade a surprise appearance alongside Jay Zduring a Get-Out-the-Vote campaign concert in Cleveland, and just last week, Jennifer Lopez and Marc Anthony held a concert in her honor. Over the weekend, Lena DunhamAmerica Ferrera and Amber Tamblynhit the campaign trail in Colorado to advocate for their chosen candidate. 

Miley Cyrus attended a rally in late October for Clinton in Virginia and even went door-to-door at the George Mason University dorms to encourage the college students to cast their votes.

Politics aside, one thing's for sure: Hollywood isn't taking this election lightly.