Jennifer Lopez shows off her cleavage in a low-cut bustier for new Guess ad

Jennifer Lopez, 48, shows off on Instagram lately her cleavage in a low-cut bustier for new Guess ad

And Wednesday was no different as the 48-year-old siren showed off a lusty new image for her Guess campaign.

This posting comes as rumours persist the Shades Of Blue actress will receive a proposal from beau of 10 months, Alex Rodriguez, this Christmas when they vacation in the Bahamas.