Pittsburgh, Pennsylvania - As Election Day drew near, a star-studded lineup of celebrities hit the stage to rally support for presidential nominee Kamala Harris, including Katy Perry and Lady Gaga!

Things took quite a harmonious turn on Election Day Eve!

On Monday night, Katy Perry took her support to the next level with a dazzling performance at the historic Carrie Blast Furnaces in Pittsburgh.

According to USA Today, fans cheered as she sang some of her biggest hits, including Dark Horse, Part of Me, and Firework.

Donald Trump Trump campaign advisors reportedly urging him to declare victory early

At the end of her set, the 40-year-old artist shared a heartfelt message, reflecting on her journey to motherhood and her wishes for the future of the US.

"Four years ago, I became a mother... She is the reason I am voting for Kamala Harris. I know she will protect my daughter's future and your children's future," she said.

The rally also featured Lady Gaga, who performed a powerful rendition of God Bless America before introducing Harris' husband, Doug Emhoff.

"For more of this country's life, women didn't have a voice. Yet we raised children, we held our families together, we supported men as they made the decisions," Gaga said.

She continued, "But tomorrow, women will be part of making this decision," adding that she believed Kamala would be a president "for all Americans."

Other stars at the event included Ricky Martin and Christina Aguilera, who also sang for the special occasion.

At the MGM Grand Garden Arena in Las Vegas, the Lady Marmalade singer took the stage to sing her empowering 2002 anthem Fighter.

"Tonight, I'm here in honor of the people who have fought to give us the privilege to be heard. Let's raise our voices and vote for freedom," she urged before performing her hit songs Beautiful and Feel This Moment.

Christina also took to X, formerly known as Twitter, to double down on her support.

Kamala Harris Kamala Harris SNL appearance flagged by FCC commissioner for violating "equal time" rule

"I support Kamala Harris, which means standing for equal rights, protection, and the freedom to live your truth," she wrote.

These are far from the first stars to step out in support of the Harris-Walz ticket, as the Democrats have also been endorsed by the likes of Taylor Swift, Beyoncé, and Bruce Springsteen.