One source claims the 18-year-old was actually bullied for being there -- apparently not everyone thought she earned the right to walk the shows!
The insider spilled:
The singer made the party rounds rocking a variety of looks, from a dainty floral dress to a va-va-voom bustier top!
And, of course, it was all about the prints!
On Friday, KatyKat attended Harper's Bazaar's ShopBAZAAR pool party in a sweet floral dress with lace underlay, styled with matching socks and lace-up booties.
Saturday, the 28-year-old was spotted hanging out with a friend in a seksalicious Dolce & Gabbana bustier top and matching flared skirt.
HOT! Also, our fave!!!
And on Sunday, Miz Perry pulled a multicolor print coat over a strapless dress while grabbing herself a hot dog.
We don't know how she managed to keep her hair frizz-free and her makeup from melting, but KUDOS!
Ch-ch-check out all of Katy's festival looks so far in the gallery (below)!