section_path: Musical career
section_name: Musical career
paragraph_text: Musical career
  
  In 2020, Pietsch took part in the ninth series of The Voice UK after missing the deadline for The Voice of Germany. He advanced to the Knockouts with the help of his coach will.i.am. The following year, he took part in the fifth season of Starmania, where he made it to the first final show. He attends the Music and Arts University of the City of Vienna after having attended the opera school of the Vienna State Opera.
  
  On 30 January 2025, " Wasted Love " performed by Pietsch, under the stage name JJ, was announced by ORF as the Austrian entry for the Eurovision Song Contest 2025 during the radio show Ö3-Wecker, aired on Ö3. "Wasted Love" was co-written by JJ, Austrian 2023 representative Teodora Špirić and music producer Thomas Thurner, and was released on 6 March 2025. He won in the grand final on 17 May, after receiving a total of 436 points. He won the jury vote with 258 points and received 178 points in the televote. He became the first Eurovision winner of Southeast Asian descent.