Washington: Mariah Carey, Justin Bieber, P Diddy and many more celebrities paid tribute to the late Michael Jackson on his 55th birthday celebrations.
Stars sent their regards to the `Thriller` star - who died of acute Propofol intoxication in June 2009 - with many posting photos and their reminiscences of the singer.
Carey posted a picture of her with the `King of Pop` with a caption reading: "Remembering Michael Jackson #KingOfPop #tbt (sic)" Contactmusic reported.
The teen popstar and rapper Diddy also paid their respects to the singer on the micro blogging site.
Film director Spike Lee sent his well wishes alongside a poem on Instagram.
Meanwhile producer Timbaland chose the day to announce he is working on new material to be released posthumously by the singer, including a track called `Chicago`.