Modge Podge, and it comes in matte, satin, glossy, glitter, you get the idea. You can use one layer to adhere the paper, let it dry, then coat the top of that with Modge Podge again like a sealer.
Not good to use on extremely humid days.
She already said that she used Mod Podge. Well, actually she said she used "Modge Podge" but I'm not aware of there being anything but Mod Podge. Although I see ppl calling it that all the time!
Must be a mix between Mod Podge and hodge podge, LOL.