If there's one artist who showcased the female body in all it's forms, it's Picasso. He was such a prolific painter and sculptor that one could take days and days looking at his work. Right now I'm loving this piece from 1921, Quatre Baigneuses (The Four Bathers).
image via about.com
Picasso painted this around the same time he was designing sets for the Ballet Russe, which might have influenced the "stagey" feeling of this painting. I love the theatrical way the light plays off of the women and how much Picasso seems to delight in their shapes. And I especially love how at ease the women seem.