Tim Rhys-Evans, the man behind popular choirs Only Boys Aloud and Only Men Aloud, said it was difficult to keep news of his MBE a secret.
He told ITV Cymru Wales his grandmother was reduced to tears on the day he received the letter, while his mother was 'beaming'.
"It's very emotional, actually. I feel very honoured and very humbled," he added.
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Rail users in Wales could be hit by disruption later this week after talks to avert a 48-hour strike broke down.
Prince Charles was all smiles during his visit to Cardiff today meeting cricketers and enjoying a chat over a cup of tea.
The Prince of Wales met members of the England and Australia cricket teams ahead of the Ashes tournament which starts on Wednesday.