Lady Gaga will join Jon Bon Jovi for an election eve gig in support of Hillary Clinton late on Monday night (07Nov16).

The public Clinton supporter will be among the big names cheering on the Democrat at a midnight rally in Raleigh, North Carolina, according to ABC News.

The get-together will be the presidential hopeful's last rally before Tuesday's (08Nov16) election.

It is not clear if Gaga will be performing or speaking at the event, which will be Bon Jovi's second Clinton rally of the evening - he's also on the bill to appear at a campaign gig in Philadelphia, Pennsylvania along with Bruce Springsteen, Clinton's husband Bill, their daughter Chelsea, President Barack Obama and his wife Michelle.

Ahead of the midnight rally, Lady Gaga took to Twitter to express her frustration with Republican nominee Donald Trump - Clinton's rival - and his wife Melania Trump after she took a stand against cyber-bullying and said it would become her priority to stamp out the issue if she becomes America's next First Lady.

"@MELANIATRUMP to say u will stand for 'anti-bullying' is hypocrisy," Gaga wrote. "Your husband is 1 of the most notorious bullies we have ever witnessed."

Madonna was also out supporting Hillary on the eve of the election - she performed a surprise set at Washington Square Park in New York 12 hours before polls open in the Big Apple. She posted a photo of herself from the event on both Instagram and Twitter, playing a red guitar while wearing a Stars and Stripes hat with a black leather jacket, and captioned it: "You May say I'm a Dreamer.......... But I'm not the only one! Vote for H.R.C."

The pop superstar announced the last-minute show on Instagram and Twitter under a photo of herself flashing V-signs. She wrote: "Meet me in Washington Square Park at 7:30 Let's Go Hard For Hillary Clinton!"

Meanwhile, stars like Robert Downey, Jr., Scarlett Johansson, James Franco, Julianne Moore, and Neil Patrick Harris have teamed up to urge Americans to make sure they vote on Tuesday in a new online video.

The clip, titled VOTE TOMORROW and directed by Joss Whedon, begins with Downey Jr., saying, "Tomorrow’s the big day. Who’s gonna get out there and vote?"

Johansson then urges voters to make a plan to cast their ballots, adding, "When are you going? Are you going before work? Are you going after? Do you have a plan? Do you have a ride?"

She then jokes, "'Cause I can drive. Not well, but I can drive."