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:
We love it when Katy Perry gets playful!
The singer appeared on Late Night with Jimmy Fallon in NYC on Thursday night in a wonderfully whimsical outfit featuring a pleated leather Belstaff skirt and House of Holland Virgin Mary-print collared top.
Spiritual! Naughty! Adorbz!
The 28-year-old also sported pigtails and knee-high Wolford stockings to complete her seksi Catholic schoolgirl look.
Just one of her many skills!
[Image via Theo Wargo/Getty Images.]