Gaga began to play the piano at the age of four, wrote her first piano ballad at 13, and began playing at open mic nights a year later. At her high school, she played the lead roles of Adelaide in Guys and Dolls and Philia in A Funny Thing Happened on the Way to the Forum; she also studied method acting at the Lee Strasberg Theatre and Film Institute for ten years. Gaga auditioned for New York shows without success, though she did appear in a small role as a mischievous classmate in the 2001 Sopranos episode "The Telltale Moozadell". In 2003, at age 17, Gaga gained early admission to Collaborative Arts Project 21 (CAP21)—a music school at New York University's Tisch School of the Arts—and lived in a NYU dorm. At NYU, she studied music and improved her songwriting skills by writing essays on art, religion, social issues and politics, including a thesis on pop artists Spencer Tunick and Damien Hirst. During her second semester of her sophomore year in 2005, she withdrew to focus on her music career. The same year, she played an unsuspecting diner customer for MTV's Boiling Points, a prank reality television show.