Chanel fashion designer Karl Lagerfield slams Pippa Middleton by saying that the Duchess' sister should only show her back.

"Kate Middleton has a nice silhouette and she is the right girl for that boy. I like that kind of woman, I like romantic beauties. On the other hand, her sister struggles. I don't like the sister's face. She should only show her back," the fashion mogul boldly said.

It seems that Lagerfield is unafraid to share his thoughts about other people. After he praised the Duchess of Cambridge, he criticized her sister. Lagerfield recently unveiled its London Olympic-themed collection at Selfridges.

Pippa made the headlines before with her beautiful behind and many people complemented her with this particular feature. Pippa made a starring role in last April's Royal Wedding where her bum attracted worldwide attention.

The comment of the top fashion designer angered many fans of Pippa. The fans vehemently vent their anger out via Twitter.

One wrote: "Quite harsh, Uncle Karl."

Another angrier fan posted: "karl lagerfeld needs to shut the f**k up!! first he calls Adele fat and now he calls Pippa middleton ugly!! you mr karl are old and ugly!!"

The fashion mogul also praised former Spice Girl Victoria Beckham. "She is great. I like her a lot. I have known her for many years. She had a career as a singer. She has a beautiful husband and stunning children and now she makes a career in fashion," Lagerfield said.

"And that body, after four children. There are not so many who have a body like that. She is very disciplined. We have the same eating habits. We did a full fashion shoot with her styled as Coco Chanel in less than three hours," the designer quickly added.

The fashion designer made the headlines last February by criticizing singer Adele about her body by saying that she is "too fat." Lagerfield later apologizes to the singer.