Superstar Beyoncé, who attended the Made in America music festival...

Superstar Beyoncé, who attended the Made in America music festival founded by husband Jay-Z over the weekend in Philadelphia, was serenaded by fans on Sunday, one day before her 36th birthday. Credit: AP / Evan Agostini

Music star Beyoncé did not turn 36 until Monday, but that didn’t stop her husband, rapper and music mogul Jay-Z, from leading a “Happy Birthday” singalong Sunday at the annual Made in America music festival in Philadelphia.

The music-programming company Music Choice posted an Instagram video of the serenade, capturing Beyoncé smiling and swaying with friends in an apparent VIP box.

As well, celebrities including singer Adele, talk-show host Ellen DeGeneres and Lady Gaga tweeted birthday wishes.

And on a birthday page at Beyoncé’s official website, 18 friends and family members, including former first lady Michelle Obama and tennis star Serena Williams, each dressed in one of her signature looks from her “Formation” music video — topped by a link to donate to Houston hurricane relief efforts.

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