Rammstein guitarists Paul Landers and Richard Kruspe kissed onstage during the band's set at Moscow's Luzhniki Stadium on Monday.
The move, made in defiance of Russia's anti-LGBTQ laws, was celebrated by Rammstein in an Instagram post headlined "Russia, We Love You!".
Russia's "gay propaganda" law was passed in 2003 by President Vladimir Putin. Its stated aim is to prevent children from being exposed to homosexuality by making it illegal to present any homosexual act as normal.
Under the law, foreigners can be arrested and detained for up to 15 days or fined up to 5,000 rubles, then deported.
A week ago at the Stadion Śląski, Chorzów, in Poland, drummer Christoph Schneider was ferried across the crowd in a rubber dinghy while waving a Pride flag in support of the Poland's LGBTQ community, who had faced violent attacks during Pride Month.
Rammstein Moscow Setlist
Was Ich Liebe
Mein Herz Brennt
Deutschland (Richard Z. Kruspe remix)
Engel (with Duo Jatekok - piano version)
Du Riechst So Gut