Per Erik Magnus Grönwall is a Swedish hard rock and heavy metal singer. In 2009, he won the Swedish Idol reality television. During several of the shows, he received standing ovations from the jury for his performances. His first single, "Higher", sold gold on digital downloads after only three days. His debut album, self-titled Erik Grönwall, was released just ten days after the finals and debuted at number one on the Swedish albums chart and was certified platinum. In 2010, Grönwall joined rock band H.E.A.T as lead singer.

H.E.A.T is a Swedish hard rock group that was formed in Upplands Väsby in 2007, when the prior bands Dream and Trading Fate merged. The band's heavy sound is strongly influenced by past melodic rock groups such as Whitesnake, with H.E.A.T having supported musical acts such as Scorpions. Between autumn 2015 to summer 2017, the group focused entirely on writing and recording songs. Into the Great Unknown was released in 2017 via earMUSIC. H.E.A.T released H.E.A.T II in 2020, and Force Majeure in 2022 after reuniting with original vocalist Kenny Leckremo.