Millions mark John Lennon's death
Millions of people have been remembering John Lennon, exactly 30 years after the former Beatle was murdered.
His widow Yoko Ono led the tributes, saying the world was still learning from his messages of peace.
She said: "On this tragic anniversary, please join me in remembering John with deep love and respect. The world was lucky to have known him. We still learn so much from him today. John, I love you."
Ono, who was beside Lennon when he was gunned down in New York, will perform at a charity concert she has organised in Japan called Dream Power John Lennon Super Live.
Now in its 10th year, some of the country's top artists will gather to participate in the gig at Nippon Budokan, Tokyo, which raises money for schools for deprived children all over the world.
The focus of the memorials in the UK will be in Lennon's home city of Liverpool, where hundreds of people are expected to attend a vigil.
They will gather around a monument dedicated to the singer to light candles and sing songs. Peace and Harmony was unveiled earlier this year by Lennon's former wife Cynthia and their son Julian in Chavasse Park.
Local musicians will lead the wellwishers and Beatles fans as they celebrate the life of one of Liverpool's best-loved sons.
Lennon was shot dead outside the Dakota building where the couple lived in Manhattan on December 8, 1980, two months after his 40th birthday.
Fans on the other side of the Atlantic are expected to pay their respects at the Strawberry Fields memorial garden in Central Park, directly opposite the spot where he was blasted by crazed fan Mark Chapman.