PARIS (AP) - Pharrell Williams says he may not understand all the laws in different parts of the world. But he still says he felt in his heart it was wrong for Iran to detail the young people who recorded a video of themselves dancing to his Oscar-nominated hit "Happy." Williams says while he doesn't live in Iran and has respect for people's religious views, he feels "everybody should be able to express their happiness and their celebration of the gift of now." Williams tweeted that he was saddened by the arrests of those in the video. Iranian officials said the participants were detained in part because the women were seen dancing without a required head covering. Williams spoke in Paris, where he was on hand to unveil a collection of artwork inspired by the title of his latest album, "Girl."