The "RHOBH" star wore a replica of the"Hustlers" actress' iconic Versace dress to the annual Casamigos party in Beverly Hills on Friday.
Posing in the daring tropical print gown, Rinna showed off her long limbs with sky-high heels.
The dress was almost exactly like J Lo's original with long-sleeves, a plunging neckline and slit all the way up to her belly.
Rinna even copied the singer's half-up, half-down hairstyle and simple jewelry.
J Lo broke necks when she rocked this bold look at the Grammys with then-boyfriend Diddy in 2000.
She actually began "trending" before it was actually a thing.
The Triumphant Return!
J Lo then did the unthinkable by surprising fashion show attendees and slipping back into a look-alike nearly two decades later.
She closed the Versace fashion show last month and reminded everyone that she's still got it.
Rinna was obviously one of the many around the world impressed with what J Lo's show-stopping moment.
Inside Casamigos Party!
Rinna wasn't the only star at the Casamigos party.
The annual party is the biggest Halloween bash of the year.
Supermodel Cindy Crawford and husband Rande Gerber looked groovy in their '70s gear alongside Scott Stuber and Amber Valletta.
Is This Thing On?
Justin Timberlake cleverly made his craft his costume.
He dressed as a microphone for the party.
Paris Hilton wore lingerie and bunny ears.
Posing in pastel pink, the hotel heiress stunned partygoers.
Nina Dobrev was on the same page as Rinna by channeling her famous peer, Billie Ellish.
The actress nailed the look in Billie's signature oversized wardrobe and colorful hair!
Casamigos party wasn't the only Halloween celebration last night. Halsey threw her own and confirmed her new relationship with Evan Peters!