Ring the alarm.

Christina Aguilera brought back her iconic look from her chart-topping 2002 “Dirrty” music video.

The singer, 44, recreated the sultry Y2K outfit when she took the stage on Saturday at San Francisco’s Portola Festival and performed the fan favorite hit over two decades after its release.

She paid homage to the song from her hit album “Stripped” by sporting a bedazzled black bodysuit paired with silver chaps and fishnet tights.

Aguilera accessorized with silver jewelry and a pair of sunglasses and wore her blond hair long and straight as she did back in the day.

The ensemble was seemingly an elevated version of what she wore in the music video and her signature style during that era of her career which included chaps, low-waisted pants and body chains.

Aguilera worked

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