The "Wrecking Ball" singer sported a sheer black top with strategically-placed cartoon sunflowers and a short black skirt over sheer, shimmering stockings and back heels.
She topped off the fun, outrageous look with a smiley face purse, matching earrings and blonde dreadlocks.
A source tells ET that Miley left SNL's historic Studio 8-H around 1:30 a.m, shortly after the show wrapped, and sneaked in the back door of Rosa Mexicano on 18th street.
The 22-year-old singer arrived with band members in a van, an eyewitness tells ET,and that a large cloud of smoke billowed out of the vehicle's doors when Miley stepped out to go to the restaurant, where she was joined by her close friend Jeff Beacher of Beacher's Madhouse.
After hanging for a bit, Miley left Rosa Mexicano and hit up a club in Chinatown at 4:30 a.m, according to an ET source. She partied until the sun came up, and left the club at 6 a.m. to head back to her hotel.
Miley had good reason to celebrate! The pop star's episode of SNL, which included a surprise cameo by presidential hopeful Hillary Clinton, received some of the show's highest ratings in recent seasons.
Miley also served as the show's musical guest, allowing her to perform a few tracks off her new album Miley Cyrus & Her Dead Petz.
The last time Miley hosted a big show was in August, when she emceed the MTV Video Music Awards, and ended up inadvertently flashing the world. Check out the video below for a look at her wardrobe malfunction, as well as some other crazier moments.