At the concert in Luzhniki, Vanya Dmitrienko's sister performed the…

At the concert in Luzhniki, Vanya Dmitrienko's sister performed the song 'You and Me'.

Consensus

Vanya Dmitrienko performed a duet with his sibling at a concert in 'Luzhniki' stadium.
The song performed was 'Ty so mnoy'.
The concert attracted approximately 70,000 attendees.
The concert was recognized in the Russian Book of Records as the first solo show by the youngest artist at the stadium.
A conflict arose over the vocal track used during the performance.
Alina Podluzhnaya (Linochka Li) claimed her vocal recording was used without her consent.
Lera Dmitrienko denied the allegations, calling them false.
The incident occurred during a concert that also included a backstage fight between violinists.

Lina Li stated she is the original performer and author of the song, and that she had never received offers to collaborate with Vanya Dmitrienko in the past three to four years. — gazeta_spb
Lera Dmitrienko explicitly denied the allegations, stating 'I have nothing to say. This is not true.' — fontanka
Lina Li emphasized she is not in conflict with Vanya Dmitrienko but considers his actions unprofessional. — gazeta_spb
Lina Li suggested removing her vocal track when performing the song without her, and warned that such actions could discredit Lera Dmitrienko. — fontanka
Social media users supported Lina Li in the controversy. — gazeta_spb
The concert featured a fight between violinists on stage. — fontanka