Listen to Un ballo in maschera, Act I: "Di' tu se fedele" (Riccardo's Song) online. Un ballo in maschera, Act I: "Di' tu se fedele" (Riccardo's Song) is an English language song and is sung by Constantin Petrovici, Romanian Opera Chorus, Romanian Opera Orchestra and Ludovic Spiess. Un ballo in maschera, Act I: "Di' tu se fedele" (Riccardo's Song), from the album Italian Café Music: 99 Must-Have Italian Dinner Classics, was released in the year 2017. The duration of the song is 3:03. Download English songs online from JioSaavn.