Watch Lady Gaga on 'The Sopranos' -- Age 15!

Check out this clip of Lady Gaga in an episode of The Sopranos from almost a decade ago!

Gaga, a.k.a. Stefani Germanotta, 24, was featured in the hit HBO show’s ninth episode during season three titled “The Telltale Moozadell.”

In her scene, a then 15-year-old Gaga appears at a high school pool, where Tony’s son A.J. and his friends go for a late-night dip.

The “Paparazzi” pop star is almost unrecognizable!!