'Toddlers & Tiaras' Star -- From Baby Hooker Costume to Biker Vixen

The mother of "Toddlers and Tiaras" star Paisley Dickey has done it again ... dressing up her 3-year-old daughter in a questionable outfit -- this time a motorcycle biker chick Halloween costume.

While Paisley's mom thankfully left the baby hooker "Pretty Woman" getup at home this time, she did deck out her baby girl in a very adult little black mini dress and motorcycle boots.

So, we gotta ask ...