WATCH: Lady Gaga's teenage acting debut

See the singer star in The Sopranos when she was just 15

Who's that girl? Footage of Lady Gaga when she was just 15 has emerged online, showing the outlandish singer starring in an episode of hit US show, The Sopranos.

THE WEIRD AND WONDERFUL STYLE OF LADY GAGA

Lovely Lady G was revealed as the seventh most powerful woman in the world according to the Forbes list last week, and now a video of her early career shows the almost unrecognisable star in one of her first acting roles. She appears as a rebellious teenager as a gang trashes a local swimming pool in the old episode, titled The Telltale Moozadell, and it's clear early on she's destined for the spotlight.

The star also smokes a cigarettes and laughs as boys throw their teacher’s desk into the water in the newly discovered clip. How dramatic!

But the Monster's Ball singer's dowdy on-screen attire is a far cry from her dramatic Gaga ensembles. Sporting mousey brown hair, jeans and a black jumper, she looks completely different during the early cameo.

LADY GAGA STYLE HISTORY