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This might top the list of most embarrassing parent moments, but it also doubles as one of the cutest.

Princess Eugenie turned 25 Monday, but because her father, Prince Andrew, couldn't be in New York to celebrate with her, he decided to use FaceTime to chat with her on her special day. But it wasn't your average one-on-one phone call; he led a group of entrepreneurs to serenade his daughter with "Happy Birthday"!

Businessmen and women were visiting St. James's Palace for a conference the royal was hosting when he made the call to ex-wife Sarah Ferguson and his daughters Eugenie and Princess Beatrice, 26. Holding up an iPad, Andrew and his 400 attendees at the event dubbed Prince@Palace sang the famous birthday song to Eugenie, who was clad in goofy birthday glasses.

A member of the audience told People, "At first people were a little surprised, but everyone got into the spirit of it."

Prince Andrew, Sarah Ferguson Duchess, Princess Eugenie, Princess Beatrice

Rex/REX USA (2)

After the sing-along came to an end, Sarah quipped, "You all need to go for choir practice," before adding, "Well done with Pitch at the Palace."

"We're very proud, Pops," one of his daughters called out.

This is Andrew's third Pitch@Palace event to be held at a palace, but has hosted others around the world. According to the event's website, the purpose of the gathering is to "add value across the spectrum of Start-up companies that this innovative and dynamic country has." Forty-two new businesses attended the event, but only 14 start-ups were selected to pitch their ideas in three minutes or less.

Jukedeck, Grabble and Opendesk were Pitch@Palace 3.0's winners. Jukedeck, which provides music for videos, garnered a $60,000 grant.

Watch the video above to see the adorable family moment!