Russian prosecutors reportedly want Alla Pugacheva, known as the "queen of Soviet pop" music, to be designated by government officials as a potential threat.
Vitaly Borodin, an activist who heads an anti-corruption group and who regularly appears on state television, submitted an official request to recognise Pugacheva as a foreign agent.
Andrey Makarevich sent Russian journalists who spread fake news about him through Ukraine obozrevatel.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from obozrevatel.com Daily Mail and Mail on Sunday newspapers.