AceShowbiz - Lady GaGa and Oprah Winfrey will join Kamala Harris and second gentleman Doug Emhoff on Monday night in Philadelphia, Pennsylvania, as the Democratic nominee makes her closing arguments to voters, according to her campaign.

Winfrey and GaGa's appearances will wrap up a star-studded lineup of back-to-back Harris-Walz events across all seven battleground states, all featuring a range of celebrity appearances and musical performances.

Harris will hold two in the battleground state of Pennsylvania, starting off in Pittsburgh where D-Nice, Katy Perry and Andra Day are slated to perform and ending in Philadelphia. Winfrey and GaGa will be joined on stage by DJ Cassidy, Fat Joe, Freeway, Just Blaze, DJ Jazzy Jeff, Ricky Martin, The Roots, Jazmine Sullivan and Adam Blackstone.

The Pennsylvania rallies are part of a series of get-out-the-vote events simultaneously taking place in other critical swing states of North Carolina, Georgia, Nevada, Arizona, Wisconsin and Michigan.

Harris' visit to Pennsylvania, a widely considered electoral swing state, comes two days before the U.S. presidential election. Harris famously belted the National Anthem at President Joe Biden's inauguration ceremony in 2021. The native New Yorker also campaigned with Biden as far back as 2016 to promote the "It's on Us" initiative, which addressed the issue of sexual assault on college campuses.

Lady GaGa, who boasts 233.1M social media followers, announced her support for Harris on Sunday. "It's time to get ready to vote," the 38-year-old pop diva said. "I'll see you guys in Pennsylvania." Lady GaGa's music video for her new single "Disease" was released last Tuesday.