PETA has branded Lady Gaga and Rihanna as "freaks" after the two pop megastars were spotted wearing clothing and accessories made from animal products.

Rihanna was criticized by the animal rights organization after she took to the streets of London on Thursday wearing a pair of thigh-high snakeskin boots, according to the Daily Express.

"Rihanna may not have a clue that snakes killed for boots are often nailed to a tree and skinned alive. Of course, they can't go on Oprah to cry about it," said a PETA spokesperson, referring to the singer's recent appearance on Oprah Winfrey's talk show.