In 2009, Stockholm-based songwriter Hanne Sørvaag and composer Fredrik Kempe wrote for him My Heart Is Yours, for the 2010 national Eurovision selection.

On 6 February Didrik won the national final at Oslo Spektrum, earning the right to represent Norway in Eurovision 2010.

He and his brother Emil Solli-Tangen were chosen by NRK to participate in the Melodi Grand Prix 2020, the Norwegian national selection for Eurovision Song Contest 2020.

Solli-Tangen won the 2021 edition of Maskorama, the Norwegian equivalent of The Masked Singer, disguised as the Snow Monster.

[2] In 2014, he co-hosted Skal vi danse replacing Carsten Skjelbreid, but he had to miss the 6th week due to his emergency surgery for appendicitis.