Music fans will remember Michael Jackson on Friday, as it's a year since the news of his death shocked people all around the world.
The star, who is one of the most successful recording artists of all time, was only 50 when he died.
Events are taking place in many countries to mark his death.
In London, a plaque in the Lyric Theatre has been put up which shows a picture of the young Michael Jackson, looking happy and smiling.
It's at the Lyric because that's where Thriller Live is shown - the musical which is dedicated to Michael's music.
Fans leave flowers by a portrait of Michael Jackson in Japan
When Michael died, fans gathered there to mourn and pay tribute to the singer.
The plaque was unveiled by dance group Diversity.
"He influenced me and the whole group so much, and it was just a real big honour to be able to do that," Perri from Diversity said.
Thousands of fans are heading to Michael's hometown of Gary, Indiana, where a memorial will be held.
A young fan with the Michael Jackson waxwork at Madame Tussaud's, Hollywood
There'll also be a private service for his family at the cemetery near Los Angeles, where he is buried.
Elsewhere around the world, fans are holding tributes, parties and other events to celebrate Michael's life and music.