Beyoncé Joins Jay Z Onstage At Global Citizen Festival For 'Holy Grail' [WATCH]

Bey surprised Jay's crowd at Global Citizen Festival in Central Park on Saturday night, and we have video evidence.

Singing Justin Timberlake's part on "Holy Grail," she also got the people going with some impressive dance moves (we wouldn't expect any less from her).

Check it out:

In its third year, the Global Citizen Festival also featured No Doubt, Carrie Underwood, fun., Alicia Keys, The Roots and Tiesto.

Broadcast on MSNBC and featuring the likes of Hugh Jackman (host), Dianna Agron, Zachary Quinto and Erin Heatherton, GCF has a stated goal to end poverty by 3030.

Queen Silvia of Sweden, Prime Minister Narenda Modi of India, Prime Minister Erna Solberg of Norway and President Obama (via video) were also present (Billboard).

Back to our favorite couple, though: As previously reported, Beyoncé and Jay Z are probably working on a new album together. DJ Skee made the big announcement last week and said the new release could be out this year.

Three weeks ago, word had it Jay-Z announced Beyoncé's pregnancy with the couple's second child during their On The Run tour stop in Paris. He reportedly changed up the lyrics to his track "Beach Is Better," rapping, "'Cause she pregnant with another one."

Though Jay and Beyoncé never addressed the rumors, a photo recently emerged squashing any baby talk. In the photo, Bey can be seen holding a celebratory glass of champagne. The shot was allegedly taken over the weekend while the couple celebrated the end of their successful tour.

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