The gorgeous Welsh superstar gave her usual flawless and powerful performance, singing Carmen's Habanera and Time to Say Goodbye (scroll down for video).
Londonderry's Phil Coulter had the audience belting out Ireland's Call, and the orchestra, conducted by David Brophy, entertained with classical favourites including John Williams's themes from Jurassic Park and Harry Potter and the Philosopher's Stone.
Now in its 12th year, the Belfast Proms also featured Lithuanian accordion player Martynas, who recently topped the classical music album chart, and virtuoso violinist Chloe Hanslip.
And there was a sneak preview of a new show from the makers of Riverdance, Heartbeat Of Home.
Hosted by broadcasters Noel Thompson and Claire McCollum, a special highlights programme on BBC NI and BBC Four will be aired at a later date.
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