Yulia Olegovna Volkova, better known by the alternative spelling of Julia, is a Russian singer best known for being a member of the Russian girl group t.A.T.u., along with Lena Katina. Formed in Moscow, Russia by Ivan Shapovalov in March 1999, the group signed a record deal with Universal Music Russia, and eventually Universal's sub-label Interscope Records in 2001.

t.A.T.u. are a Russian pop duo consisting of Lena Katina and Julia Volkova. The two started out as part of the children's musical group Neposedy before being managed by producer and director Ivan Shapovalov and signing with Russian record label Neformat. t.A.T.u.'s debut album 200 Po Vstrechnoy (2001) was a commercial success in Eastern Europe, and that resulted in the duo signing with Interscope Records to release its English-language counterpart, 200 km/h in the Wrong Lane (2002). The album was certified platinum by the IFPI for one million copies sold in Europe and became the first album by a foreign group to reach number one in Japan. It was also certified gold in the United States and included the international hits "All the Things She Said" and "Not Gonna Get Us". The duo represented Russia in the Eurovision Song Contest 2003 with the song "Ne ver', ne boysia", finishing third.