I thought I had to post some information after I had just finished reading a post on here.
Chinese Crested Powderpuffs are not throwbacks from a Chinese Crested LOL
There is 2 distintive varieties of Cresteds.
The powder puff Chinese Crested is born in the same litters as the hairless Chinese Crested; the powder puff is a recessive gene off of the dominant hairless gene.

If 2 hairless Cresteds are bred together, Statistically 1/4 of the litter will be powder puffs, however, if two puffs are bred together - the entire litter will be powder puff as both parents are lacking in the hairless gene.
There are 3 gene expressions in the Crested breed; Hp, pp, and HH.
"Hp" is a hairless Chinese Crested (One dominant hairless gene and one recessive puff gene - one gene inherited from each parent) This gene expression can occur if one or both parents are hairless.
"pp" is a powder puff (two recessive puff genes - one gene inherited from each parent) This gene expression can occur if one or both parents is a powder puff.
"HH" is a hairless puppy born from two hairless parents that inherited a hairless gene from both parents.

To also put the record straight Powderpuffs are usually less value than a Hairless