Don't let pregnancy stop the party!

Kylie Jenner was giving French Montana the middle finger as she laughed stage-side at the iHeart Radio Music Festival in Las Vegas on Saturday, hiding her baby bump with an oversized tee and looking like she doesn't have a care in the world!

And she does! Baby daddy Travis Scott was also at the concert, though the two weren't photographed together ... if in fact he IS actually her baby daddy. Kylie's ex Tyga claimed paternity of "the kid" the other day on Snapchat and promptly deleted the post. Will there be a DNA test???