Who? Russian pop singer.
Julia Volkova was half of the Russian pop music duo t.A.T.u. from 1999 to 2011. She launched a solo career in 2008.
A supposed Julia Volkova sex tape appeared online in 2011. The 14-minute video is a generic porn clip complete with cheesy porn music. The woman in the video is clearly not Julia Volkova, just some Russian pornstar who looks a little like her.
Here’s the real Julia Volkova from her early t.A.T.u. days:
Not a bad resemblance as lookalike fake sex tapes go, but sorry, Julia Volkova was not moonlighting in cheapo porn while making millions as a pop singer.