The Fancy hitmaker is newly single after dumping her sportsman fiance Nick Young last month (Jun16), and on Saturday (23Jul16), she was among the stars spotted attending Jennifer Lopez's All I Have residency show, where French was also a guest.
Montana took to Snapchat to document the outing, captioning a shot of the pair, "Vegas nights iggy ice gang (sic)".
They were then spotted hanging out again hours later at the Jewel nightclub at the Aria Resort & Casino, where Iggy was booked to perform in the early hours of Sunday (24Jul16).
A source tells E! News the two stars began chatting at length in the VIP section, where they had been seated at nearby tables, and shared drinks as they raised a toast.
Iggy even reportedly acknowledged French's presence during her set by flashing the peace sign in his direction as she took the stage to perform tracks like Fancy, Black Widow, and Team.
The eyewitness claims Iggy and French later hit the dancefloor to let loose, and left the club together at around 2.30am local time.
The stars have yet to comment on their night out, during which Montana, who previously dated Khloe Kardashian, also made an appearance at Jennifer Lopez's birthday bash at Caesar's Palace.
Meanwhile, Iggy has revealed her break-up from basketball player Young will not feature on her upcoming album Digital Distortion, because the project was completed months before her relationship ended.
"My album has already been recorded," she told reporters who asked if the split had inspired any of her songs. "It's been finished since February, so none of that in there."
Iggy called off her engagement amid allegations of Nick's infidelity, and shortly after their separation, Young's ex-girlfriend, the mother of his son, Nick, Jr., confirmed she was pregnant with the sportsman's second child.
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