Jennifer Lopez is upstaged by her own SISTER in rivaling racy gown as the duo kick off singer's 57th birthday celebrations in Paris

Jennifer Lopez got upstaged by her younger sister Lynda Lopez in their dueling dresses while leaving Italian restaurant Gigi Paris in France on Thursday.

The 55-year-old New York Emmy-winning journalist normally dresses conservatively - but she dared to bare in a cleavage-boosting black cut-out gown that exposed parts of her torso, hips and legs.

The Grammy-nominated pop diva - who turns 57 on July 24 - flashed her legs beneath a sheer halter-neck nude-beaded gown, white feathered shawl and matching clutch selected by styling duo Rob Zangardi and Mariel Haenn.

Hairstylist Justine Marjan slicked back JLo's locks into a tidy bun and make-up artist Rokael Lizama fully contoured her suspiciously-unlined complexion.

The Bronx-born siblings have been holding court front row at numerous Paris Fashion Week Fall/Winter Haute Couture runway presentations this week.

The Daily Mail has reached out to Lopez's rep for comment, but did not immediately hear back. 

In 2021, Lynda called JLo her 'original BFF' and her 'ride or die' in a birthday tribute on Instagram five years ago.

'I love you more than words can say,' the 1010 WINS at 92.3 FM reporter gushed.

'You light the world and show me what's possible and are my inspiration always. Sometimes I can't believe I was so lucky that God put the beautiful soul that is you into my life.'

The Nuyorican Productions co-founders - who used to run the Lopez Family Foundation - even got pregnant at the same time, and watched as their children graduated college last month.

Lynda welcomed her 17-year-old daughter Lucie Wren Lopez-Goldfried with ex-boyfriend Adam Goldfried while JLo welcomed her 18-year-old fraternal twins - Emme Muñiz (aka Oskar) and Max Muñiz - with third ex-husband Marc Anthony.

The Everything's Fine singer flew to France from New York City where she attended Taylor Swift and Travis Kelce's $20 million top secret wedding at Madison Square Garden last Friday.

JLo finalized her divorce from fourth ex-husband Ben Affleck last year, and she's still trying to unload their marital mega-mansion in Beverly Hills for $49.995 million - $18.1 million less than they paid for it.

 'Yes! I shoulda done it sooner!' the single empty nester told Jimmy Kimmel Live! of her 'fantastic' relationship status in May.

'I've been doing it all wrong. I've been doing it all wrong, trust me.'

JLo added: 'I'll meet somebody somewhere one day if they're good enough.'

The JLo Beauty founder will next produce and star as the titular Daphne Parrish in Robert Zemeckis' psychological thriller The Last Mrs. Parrish, which premieres in late 2026/early 2027 on Netflix.

The small-screen adaptation of Liv Constantine's 2017 bestselling novel will also feature Nikolaj Coster-Waldau, Isabel May, Debi Mazar, Denis O'Hare, Pierson Fodé, Renata Friedman and Eduardo Ramos.

JLo needs a hit after the box office failure of The Kiss of the Spider Woman only earning $2 million last year after a $30 million budget and her latest rom-com Office Romance received dismal reviews.

The ex-girlfriend of Diddy - whose big break was starring in Gregory Nava's 1997 Selena biopic - will also reportedly produce an animated Bob the Builder movie for Amazon MGM Studios starring Anthony Ramos.

JLo - who pulls 54.7 million monthly listeners on Spotify - originally got her start in 1991 as a Fly Girl for Fox's comedy sketch show In Living Color before serving backup dancer duties for Janet Jackson in 1993.