Complex sentence: After moving to New York in 2004, Mandy began performing with rock trio, Lights Resolve; touring with The Used, Shiny Toy Guns, and Panic! at the Disco; and performing at major music festivals, including The Bamboozle and CMJ.
Split into simpler sentences: After moving to New York in 2004, Mandy began performing with rock trio, Lights Resolve; touring with The Used, Shiny Toy Guns, and Panic! At The Disco; and performing at major music festivals, including The Bamboozle and CMJ.