Liam Cacatian Thomassen (born 10 September 1997), also known as Liamoo, is a Swedish singer. In 2016, he won the twelfth season of Swedish Idol series and released his winner's single "Playing with Fire". 　　In 2016 Cacatian Thomassen auditioned to take part in the twelfth season of Swedish Idol. During the Qualifying Week he took part in the fourth heat performing the song "Sure Thing", he failed to qualify for the Finals, but went through as a wildcard. He made it through the live shows to the final along with Rebecka Karlsson and Charlie Grönvall. On 9 December 2016 he won the contest. After winning Idol, Cacatian Thomassen released his winner's single "Playing with Fire". The song peaked at number 6 on the Swedish Singles Chart. 　　Cacatian Thomassen competed in Melodifestivalen 2018 with the song "Last Breath". He finished in 6th place in the final. 　　He also participated in Melodifestivalen 2019 with the song "Hold You" in a duet with Hanna Ferm. They both finished in 3rd place. 　　Liam has roots in Sweden, Norway, Finland and Philippines. 　　Liam grew up bullied in school, he had no friends and he felt lonely spending the breaks by himself. While every guy in his school was playing soccer, he was interested in his sketchbook. 　　He dropped out of school in the first year of Upper Secondary School. Liam had a lot of trouble getting along with the teachers. It was like this for him "I am your teacher, you'll only listen", he says. Nobody understood his purpose/goal. He says he didn't need the school. Most of what he learned is from "the streets, reality, music and people". Even now he still doesn't have a huge circle of friends to hang out with but according to him, he is happy with who he is and what he has.