Isaak Guderian, born 31 January 1995, known mononymously as Isaak, is a German singer. In 2020, during the COVID-19 pandemic, he started composing music, and in 2021 he won Show Your Talent, marking his breakthrough. Guderian took part in the German national final for the Eurovision Song Contest 2024 with the song "Always on the Run", ultimately winning the right to represent the country at the contest.