Tomi Petteri Putaansuu, known professionally as Mr Lordi, is a Finnish musician, businessman, special effect make-up artist, songwriter, painter, comics artist and graphic designer. He is best known as the lead vocalist of rock band Lordi. In the band he is responsible for songwriting and creating all the masks, costumes, graphics and stage props.

Lordi is a Finnish hard rock and heavy metal band. Formed in 1992 by the band's lead singer, songwriter and costume maker Mr Lordi, Lordi are known for wearing monster masks and using horror elements with pyrotechnics during concerts and music videos. The band rose to fame in 2002 with their hit single "Would You Love a Monsterman?", and won the Eurovision Song Contest 2006 with their song "Hard Rock Hallelujah".