台語流行音樂
Tamminen has produced and/or co-written songs for other Finnish artists such as Robin, Kaija Koo and Annika Eklund. In 2012, he produced and co-wrote the Japan Hot 100 number-one song "Electric Boy" by a Korean group Kara. He co-wrote the song "Fantasy" for Taiwanese pop singer Jolin Tsai. He has also written music for Korean group Shinee.