Adorable "Toddlers and Tiaras" star Paisley Dickey suffered a devastating loss when her little pet bunny died -- and now the little fur ball's getting STUFFED for posterity.
It's pretty sad ... 4-year-old Paisley -- who first made headlines for wearing the Julia Roberts' "Pretty Woman" hooker outfit -- only had little "Bun Bun" for two weeks ... when he died of a heart attack.
Paisley's mom Wendy tells TMZ they tried to bury Bun Bun, but when Paisley refused to say goodbye ... they decided to take the taxidermy route -- and videotape the whole thing.
In the video ... Paisley and her parents hit up their local animal stuffer in Georgia, so Paisley can choose Bun Bun's eternal resting position -- inside one of her pink-jeweled tiaras.
In case you're wondering ... Wendy says Bun Bun suffered the cardiac arrest when a balloon-popped. She says they didn't realize pet bunnies commonly die that way.
RIP Bun Bun.