Countess Luann de Lesseps is serving up another life lesson through song.

The "Real Housewives of New York City" star debuted her latest track, "Girl Code (Don't Be So Uncool)," on "Watch What Happens Live" on Tuesday night, grooving on stage with her band and her daughter, Victoria. 

The Countess says the lyrics stem from a feud with her costars during a disastrous trip to Turks and Caicos, where she famously told her gal pals, "Be cool. Don't be all, like, uncool."

"I really felt violated, so that really inspired me to do the song," she told E! Online, saying that tune refers to "when friends who you think are friends don't really turn out to be friends, and they break that certain girl code."

Check out the clip above to see Luann and her daughter perform the song -- host Andy Cohen and Lu's "RHONY" costars, Sonia Morgan and Dorinda Medley, are totally into it!

This, of course, isn't the Countess' only chart-topping hit. Who can forget her classic tracks (and music videos) for "Money Can't Buy You Class" and "Chic, C'est La Vie"?!

Check those out below. You're welcome.

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