Answer
Julia Volkova was the partner of Lena Katina in the t.A.T.u. group. They were both born in Russia and started their career together in the early 2000s. The group was known for their controversial image and lyrics, and they quickly became one of the most popular girl groups in the world. However, they disbanded in 2011. Volkova and Katina have both continued to pursue solo careers since then.