During a performance of "Can't Hold Us" by rapper Macklemore, the judge and singer-songwriter Lena Meyer-Landrut selected him to be part of her team.

[2] In October 2016, after the release of his first album Compass, a signing session in Ulm had to be stopped by police because some fans fainted.

[citation needed] In 2018, Rieger released his second album called "Code" and toured around Germany, Austria, Switzerland, and the Czech Republic.

[3] He was eliminated during the 3rd episode, together with this dance partner Katja Kalugina, due to too few viewer votes.

Rieger has sometimes been referred to as "the German Justin Bieber", and he has covered the Canadian artist's song "Take You".