According to the outlet, the 73-year-old was caught on camera falling asleep, and his head drooped forward. But when he saw the cameras go off, he quickly sat back up.
Earlier this week, Prince Charles landed on the island, which recently cut ties with Queen Elizabeth.
"From the darkest days of our past, and the appalling atrocity of slavery, which forever stains our history, the people of this island forged their path with extraordinary fortitude," he said in a speech on Monday, November 29. "Emancipation, self-government and independence were your way-points. Freedom, justice and self-determination have been your guides. Your long journey has brought you to this moment, not as your destination, but as a vantage point from which to survey a new horizon."
The 95-year-old monarch also sent her well-wishes, as she couldn't be there. "As you celebrate this momentous day, I send you and all Barbadians my warmest good wishes for your happiness, peace and prosperity in the future," the Queen said in a message to Mason.
"Over the years, our countries have enjoyed a partnership based on common values, shared prosperity, and close collaboration on a wide range of issues, including recent work on climate change. It is also a source of great satisfaction that Barbados remains an active participant within the Commonwealth, and I look forward to the continuation of the friendship between our two countries and peoples," she concluded.
Musical artist Rihanna was also in attendance, as she was given a special title. "On behalf of a grateful nation, but an even prouder people, we therefore present to you the designee for national hero of Barbados, Ambassador Robyn Rihanna Fenty," Prime Minister Mia Mottley said. "May you continue to shine like a diamond and bring honor to your nation by your works, by your actions and to do credit wherever you shall go."