The opera singer, 42, donned a glittering white gown for one part of her show, called Christmas with Katherine. She later changed into an off-the-shoulder red ball dress with puffed sleeves.
On this luxury seven-night river cruise, Russell will give a special talk, host a question-and-answer session, and give a private concert in Italy s stunning floating city.
West End star Michael Ball will return to the West End in a new production of Andrew Lloyd Webber's Aspects of Love opening at London's Lyric Theatre this May.
Ahead of his appearance at the Last Night of the Proms, the cellist talks about growing up in a house full of musicians, and his love of Tupac and Arsenal