The former Miss Wales, 31, has shared a couple of selfies from her sun-soaked break and shown off the post-baby body she's worked very hard for - including one of her bum!
Alongside a shot of her bottom, Imogen joked: "Does my bum look big in this?! #vegas #encore #davidguetta #chanshen."
And, although we're no geniuses, we can answer with a resounding NO!
Infact, Imogen looks amazing in her black Dream Team swimsuit after dropping a stone and a dress size since the birth of her daughter Ariana Siena in February 2013.
The Celebrity Big Brother star now weighs 9st 6lbs and is a size 10 - and she recently shared her weight loss tips with Reveal readers.
Toned but curvy Imogen is currently in America's 'Sin City' for Chantelle Tagoe's hen party, who is getting married to retired England football player Emile Heskey.
Model Imogen has been working hard down the gym in order to get a "Vegas bod" and she definitely got there in the end!
And her fans seem to agree... After posting the swimsuit snaps, one said "wow! You look amazing & sexy", while another simply said "peachy".
One spoke for all of us when she said: "All the hard work has paid off babe x congrats kisses and enjoy vegas x."
What do you think of Imogen's post-baby body? Tell us below!