[custom_adv] She started her YouTube channel in March 2014. In the Ranking of most subscribed YouTube channels in Germany, she is in the top 50 with over 2.6 million subscribers. [custom_adv] In 2015, she reached the top 10 of the German Charts as a feature on German RnB singer Ado Kojo's song Du liebst mich nicht, a cover of the song by the same name by German rapper Sabrina Setlur. [custom_adv] In February 2016 it was reported that she had cancelled her contract with YouTube network TubeOne Networks, who had made her famous. [custom_adv] In 2017, she was one of four judges at DSDS, the German version of American Idol. She moved to Berlin in 2018, having lived in Cologne for more than three years previously. [custom_adv] In January 2019, David released her first official single Orbit out of her debut album Supersize. [custom_adv] In February, her second single Gib Ihm was released, reaching number one in the German Charts. About two months later, Shirin released the song ICE, which was followed by Fliegst du mit in May. At the end of June 2019, she published the single On Off featuring Maître Gims which was followed by the single Brillis in August. [custom_adv] On September 20, 2019, she released both the single Nur mit Dir feat. Xavier Naidoo and her album Supersize, which peaked at number one on the German Album Charts. She thus became the first national female hip-hop artist to reach number one.