Ekaterina Dmitrievna "Katya" Ryabova (, born 4 August 1997) is a Russian singer. She is from Shchyolkovo, but now resides in Yubileyny.
She was selected to represent her country in the Junior Eurovision Song Contest 2009 with the song Malenkiy Prints (The Little Prince). At the contest on 21 November in Kyiv, she got third place with Luara Hayrapetyan from Armenia placing second after Armenia received 3 twelves and Russia 2. In 2011, she became the first returning artist in Junior Eurovision history, representing Russia again with the song Kak Romeo i Dzhulyetta (Like Romeo and Juliet), finishing in fourth place.