Donna Tubbs. She's got a big ass, which shows while she wears tight sweat pants.
Donna dress as a prostitute in "Escape from Goochland", after confiscating it from Roberta and was convinced by Cleveland to wear it. At one point, she gets arrested due to being mistaken for a real one, and was thrown into the back of the police wagon with three other hookers. While fighting some Goochlanders, one of her boobs flung out of her bra.
Her Hot Cocoa costume.
Roberta Tubbs. She wears a bikini in "Fat and Wet", getting everyone's attention. Even Kendra (embarrassed to be wearing a swimsuit) stares at her.
Roberta's sexy costume in "It's the Great Pancake, Junior Brown".
Tori from "Frappe Attack!". She's has a nice ass (not as big as Donna's), and wears tight jeans and high-heel boots. Tori appears to be very affectionate towards Donna. When Cleveland introduces her to his wife, Tori raised her eyebrows up and ran to hug Donna.
Donna and Roberta's fight in "How Do You Solve a Problem Like Roberta?".
Roberta and some other girls in elf costumes in "'Tis the Cleveland to be Sorry". Refusing to be treated disrespectfully, they remove their costumes and leave. But it's so cold they huddled up together for warmth.
In "Another Bad Thanksgiving", a cutaway gag has Donna's sister Janet dress like Mileena from Mortal Kombat.