Pink has slammed members of the Royal Family for continuing to support hunting and wearing fur.
The singer turned down an invite to perform at Prince William's 21st birthday party in 2001 in protest against the Prince's love of the sport.
Speaking to the Daily Star, Pink said: "He wanted me to play a concert for his 21st birthday but I wrote back, saying I wouldn't until he explained why he went hunting.
"I'm still waiting for a reply to my letter to Prince William.”
The singer, who is currently number one on the UK charts and a supporter of the animal rights group PETA, said she didn't understand why she couldn't question the Royal Family's beliefs.
"I don't get that we can't question people because of their position in society,” she said. "I want to make people think about their responsibilities. I don't care if they have a crown."
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