The birthday girl made everyone stop and stare when she posted a photo showing herself wearing a gigantic sparkler over the weekend while jumping on a yacht with her boyfriend in St. Tropez.
Earlier this week, J Lo and Affleck made their three-month on-again romance Instagram official, but it's nothing compared to the one she shared today.
The couple -- dubbed Bennifer -- were spotted making out on the giant sea vessel on Saturday. J Lo even posted a shot of them kissing on her IG.
Fans went wild for their debut on the Gram, which seemed to show J Lo staking her claim -- and now, she's flashing another asset.
The Hustler's star also posted a close-up of her hand and her perfectly manicured nails while showing off the biggest rock ever.
Wearing a rectangular-shaped green diamond with a silver setting, J Lo left all of her followers in awe.
Despite her nails being on point, nothing could take attention away from the stunning bling on her ring finger.
Let us remind you when Affleck popped the question back in 2002, he proposed with a 6.1-carat pink diamond.
But this isn't what you think.
Despite J Lo's love for colorful diamonds, this one was given to her by Dolce & Gabbana.
And just in case anyone was confused, the star made sure to give them a shoutout on her social media.
"Thank you @dolcegabbana," J Lo captioned the photo on her Instagram Story.
While J Lo is basking in her blinged-out glory, her ex-fiancé Alex Rodriguez is sliding into his best single life.
The 45-year-old former slugger was photographed on a yacht with a gaggle of bikini babes as he gears up to celebrate his own birthday next week.
This is the first birthday J Lo and A-Rod haven't shared together in four years.
After J Lo called off their engagement in April, she reconnected with her ex Ben Affleck.
She once almost walked down the aisle with the Oscar winner, but they delayed their wedding just days before.
This time, it feels like the real thing.
J Lo and Affleck have even been spotted house hunting, but don't get excited yet.
Radar is told they won't make a purchase until the singer is "financially free" from A-Rod.
"Jennifer is still untangling her financial assets from Alex Rodriguez. There is no way she is buying a home with Ben until she is financially free from Alex," our insiders say.