The superstar joined fellow celebrities such as Katy Perry, Oprah Winfrey, and Christina Aguilera in backing the Democratic ticket ahead of Election Day.

Gaga played "God Bless America" at the series of get-out-the-vote rallies that also featured Oprah Winfrey, Jon Bon Jovi, Ricky Martin and others before today's (Nov. 5) pivotal election.

Celebrities, including Oprah Winfrey, DJ Jazzy Jeff, and Fat Joe will join Harris on the steps of the Art Museum of Phildelphia for the free event in the city, which will start at 5 p.m. to 10 p.m. Harris is not expected to address the crowd till around 11 p.m.

Lady Gaga will join Vice President Kamala Harris at her final rally of the campaign Monday night in Philadelphia. It is the first campaign appearance f

Lady Gaga endorsed Kamala Harris on social media Sunday (Nov. 3), when it was announced she’ll be headlining the Democratic presidential candidate’s campaign rally in Philadelphia on Monday (Nov. 4), the eve before the election. Katy Perry leads the lineup of the VP’s Pittsburgh rally on the same day.

Lady Gaga, Katy Perry, Oprah Winfrey, the Roots and more will take part in Kamala Harris' Election Eve rallies in Pennsylvania, the campaign announced.

The lineup for the star-studded Philadelphia rally had been under wraps and was announced Monday as part of a series of rallies happening in seven battleground states.