gagasopranos.jpgleft pic courtesy of HBO

But back then she was using her real name, Stefani Germanotta.

A 15-year-old Lady Gaga guest starred on an old episode of The Sopranos (entitled "The Telltale Moozadell") in a bit part as a smoking teenager who laughs at A.J. and his buds vandalizing a swimming pool after hours. Talk about hardcore!

Check out LG's scene below. Is she as fierce back then as she is now?