He made his breakthrough in Sweden in 2000 with the song "Känn ingen sorg för mig Göteborg" and the album with the same name.

In 1997 he rejoined Broder Daniel to play the bass, until 2003 when he left the band again to focus completely on his solo career.

On 5 June 2016, he performed a concert at Ullevi Stadium in Gothenburg that set a new attendance record of 70,144 people.

[2] In the summer of 2020, he was supposed to celebrate 20 years since his first album release, by having four concerts at Ullevi Stadium.

Hellström is also known for the many complaints about his singing off key,[5][6][7] but some music critics have defended him, calling his voice sensitive and strained, as well as unique and gripping.