Mr Lordi, who sings in Finnish hard rock band Lordi, has worn his stage outfit while receiving the vaccine against COVID-19.
The frontman of the band that won the Eurovision Song Contest in 2006 with the hit Hard Rock Hallelujah showed up for his second shot on Sunday in the northern city of Rovaniemi.
"They put a big needle in my arm, and that's exactly why I came here," said Mr Lordi, whose real name is Tomi Petteri Putaansuu, according to radio station Yle.
The event was planned in order to encourage younger people in particular to be vaccinated against COVID-19.
Australian Associated Press