Mathew McNulty, better known as outsiderX, is an American rapper, singer, and songwriter from Los Angeles, California. Although he states that he makes music for any genre, he typically makes Trap Metal, Grunge, Emo Rap, and Phonk music. His first song, “Power Lines” became an immediate hit, gaining over 1 million Spotify plays in under 3 years. Since then, he has created multiple other fan favorites, such as BAD BLOOD, Fever Dreams, and ReUP. He has collaborated with many important figures in the Trap Metal scene, such as Istasha, Qoiet, KAMAARA, TWENTYTHREE, ONI INC., and Prompto. As his audience grows larger and larger, he continues to provide with consistent releases, coming out with a new song for almost every month of the year.