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

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.

Gaga was joined byDJ Cassidy, Cedric the Entertainer, Fat Joe, Oprah Winfrey, will.i.am and more the night before Election Day in a get-out-the-vote final push from the Democratic campaign.