Beyoncé also turned 35 on Sunday

By Maria Mercedes Lara
Updated October 04, 2016 07:40 PM
Adam Schultz for Hillary for America

Bill Clinton didn’t take time off during Labor Day weekend – he was busy getting young voters to show up to the polls in November.

Of course, he also took time to wish longtime Hillary Clinton supporter Beyoncé a happy 35th birthday.

An aide to the former president tells PEOPLE that Clinton made an “impromptu visit” to Jay Z‘s Made in America festival in Philadelphia Sunday to visit with volunteers registering voters.

“Hillary for Pennsylvania has had a voter registration booth throughout the festival, helping work toward achieving the campaign’s national goal of registering or committing to vote 3 million Americans ahead of November,” the insider said.

“President Clinton thanked the volunteers for their commitment to Hillary Clinton’s campaign and for doing the hard work of expanding the electorate in Pennsylvania,” the source added.

Clinton, Beyoncé and Jay Z were spotted chatting and smiling in the VIP area, with Clinton taking Beyoncé’s hand at one point in the conversation. Other stars in the ultra-exclusive section included gold medal-winning basketball star Carmelo Anthony and Chance the Rapper, whose festival performance was watched by Clinton.

“President Clinton spent time with Jay Z and Beyoncé and Chance the Rapper,” the insider revealed. “He also saw Michael B. Jordan, Terrance J., and DJ Khaled. He saw Jay’s mother, Gloria Carter, and told her how proud she must be of her son.”

Queen Bey is a longtime supporter of Clinton’s wife, even attending a Democratic fundraiser for the presidential hopeful last May.

The singer also celebrated her birthday on Sunday at the festival, and Clinton was sure to wish her well, the aide said.

The Made in America festival, which was founded by Jay Z, is a two-day event featuring performances from some of the biggest names in music, including Rihanna, Coldplay, Chance the Rapper, Desiigner, FKA twigs and DJ Khaled, just to name a few.

Related Video: Celeb Trainer Harley Pasternak Shows You How to Get Buns Like Beyoncé

Rihanna – and her new matching tattoo with Drake – took the stage on Satuday, with Jay Z and Beyoncé’s friends Coldplay scheduled to close out the night on Sunday.

Aside from mingling with a former POTUS, Beyoncé also celebrated her big day by releasing the music video for “Hold Up” on YouTube.