Jennifer Lopez shows off her curves in white peplum dress... after secret meeting with ex-husband Marc Anthony

She's been busy promoting her new film Parker one designer dress at a time.

And Jennifer Lopez looked white hot in her ladylike sleeveless peplum frock at a New York screening for the heist-thriller at MOMA Wednesday night.

Despite the whirlwind publicity blitz, the 43-year-old pop star had somehow arranged to spend two-and-a-half hours secretly meeting with her ex-husband Marc Anthony Tuesday.

Fierce and flawless: Jennifer Lopez looked white hot in her ladylike sleeveless peplum frock at a New York screening for Parker at MOMA Wednesday night

White hot! The 43-year-old pop star had arrived to the heist-thriller screening in a chic coat and she accessorised with a matching clutch and pumps

According to the New York Post, Jennifer headed to The Mark between talk show appearances, despite the fact that she was actually staying at the London Hotel.

The 44-year-old salsa crooner, who just performed at the Commander in Chief's Ball, was then spotted leaving the hotel and ducking into his tour bus after their mysterious meeting.

It's my moment! J Lo waves to her fans

Looking her best: Jennifer says filming Parker helped her through her divorce

'He came out really quickly, with his head down, like he didn't want to be seen,' an eyewitness told Page Six.
The fierce diva changed into four separate ensembles to promote her new heist-thriller Parker - due out January 25 - but she opted to wear her sexiest outfit to meet with her on/off ex.

Jennifer, wearing a smug smile, was clad in a flirty leopard-print skirt, matching jacket, and thigh-high Louboutin boots.

Movie star: In the film, Jennifer plays a divorced real estate agent who assists a professional thief (Jason Statham) after he's double-crossed and shot by his gang

Close to home: Jennifer - here with Statham and director Taylor Hackford - was in the midst of divorcing ex-husband Marc Anthony when she shot Parker, which provided her with creative 'therapy'

It's not exactly the kind of thing you'd imagine the former American Idol judge would wear just to discuss the welfare of the former couple's twin toddlers, Emme and Max, who turn five next month.
Aside from their marriage, Jennifer and Marc once co-headlined a North American tour together.

In 2006, they co-starred as a married couple in the critically panned El cantante, based on the life story of Hector Lavoe who started the salsa movement in 1975.

On the down-low: Despite the whirlwind publicity blitz, Lopez had somehow arranged to spend two-and-a-half hours secretly meeting with her ex-husband Marc Anthony Tuesday

On/off love: The 44-year-old salsa crooner, who just performed at the Commander in Chief's Ball, was spotted leaving The Mark after their mysterious meeting

On the prowl: The fierce diva changed into four separate ensembles to promote Parker Tuesday, but she opted to wear her sexiest outfit to meet with her on/off ex