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Lady Gaga and Katy Perry are among the celebs who've been tweeting about the death of Osama Bin Laden.
The world's most wanted man was killed in a US operation in Pakistan.
Lady Gaga tweeted, "Just landed. Watching CNN, what a historical moment in the fight against hatred."
Katy Perry was in two minds about whether to celebrate Bin Laden's death, "America! F**k yeah! Here to save the motherf**kin’ day… I am relieved in some ways, but have a feeling of uncertainty now. I believe in justice, but don’t you think that an eye for an eye will make the world blind?"
Replies to Katy's tweets included, "BinLadens death in comparison to the thousands he killed in return is not only justified but essential Australia is here to help." and "I lost someone close to me that day and he deserves what he got".
Jason Derulo tweeted "Huge moral victory against the world's biggest evil, HATRED!"
Lindsay Lohan simply posted "Go USA"