Beautiful Image search engines

My favorite image search engines

1. Google images
   http://images.google.ca/imghp?hl=en
2. Chinese ex-Google (baidu.com)
   http://image.baidu.com/i?tn=baiduimage&ct=201326592&lm=-1&cl=2&word=beauty&t=51
3. Flickr.com
   http://flickr.com/search/?q=beauty