Beatles members John Lennon and Paul McCartney sing their harmonizing vocal lines in the Abbey Road Studios in London, England, February 11, 1968, during a recording session. (AP Photo)

 

 

 Beatles John Lennon, center, and Paul McCartney, arrive at the London Pavillion cinema on July 17, 1968 for the premiere of their new animation film "Yellow Submarine." At left is Japanese film producer Yoko Ono. (AP Photo)

 

 

 Linda McCartney's photo of John Lennon, left, and Paul McCartney taken during the photo session for the cover of the Abbey Road album in 1969. The photo was part of the Linda McCartney photography exhibit at the Rock and Roll Hall of Fame and Museum which ran through Aug. 8, 1999 in Cleveland. (AP Photo/Linda McCartney)

 

 Beatle John Lennon, right, and Yoko Ono are shown circa 1969 at an unknown location. (AP Photo)

 

 

 Beatle John Lennon waves his marriage certificate as his bride, Japanese artist Yoko Ono, stands at his side after their wedding at the Rock of Gibraltar on March 20, 1969. They are about to board a chartered jet to Paris where they will honeymoon. (AP Photo)

 

 Beatle John Lennon and his wife, Yoko Ono, right, hold a bed-in for peace in room 902, the presidential suite at the Hilton Hotel in Amsterdam on March 25, 1969. The newlyweds, holding solitary tulips, begin a seven-day Love-In to protest against war. (AP Photo)

 

 John Lennon and his wife Yoko Ono share an Eskimo kiss (rubbing noses) during an interview in London, Feb. 9, 1970. Both had their hair shorn in Denmark to be auctioned off in London. The proceeds went go to the Black Power organization in Britain. (AP Photo/Bob Dear)

 

 

 John Lennon and his wife Yoko Ono speak to news media on their arrival at New York's Kennedy Airport, June 1, 1971. The trip to New York is part of a bid by the Lennons to gain custody of Yoko's seven year old daughter Kyoko. (AP Photo/Ron Frehm)

 

 

 A photo of John Lennon which was part of the Rock & Roll Hall of Fame exhibit John Lennon: The New York City Years. (PRNewsFoto/Rock & Roll Hall of Fame Annex)

 

 

 Former Beatle John Lennon and his wife Yoko Ono sing during a demonstration by about 500 in front of British Overseas Airways Corp. offices on Fifth Avenue in New York, Feb. 5, 1972. Demonstrators called for the withdrawal of British troops from Northern Ireland. (AP Photo/Ron Frehm)

 

 Former Beatle John Lennon, left, and his wife Yoko Ono, leave the Immigration and Naturalization Service, at 20 West Broadway, March 16, 1972, New York. (AP Photo/Anthony Camerano)

 

 Former Beatle John Lennon performs during a charity concert to benefit mentally challenged children at Madison Square Garden, Aug. 30, 1972, New York. (AP Photo/Dave Pickoff)

 

 John Lennon and his wife, Yoko Ono, arrive at The Hit Factory, a recording studio in New York City on Aug. 22, 1980. (AP Photo/Steve Sands)

 

 

 This photo provided by Swann Auction Galleries shows John Lennon and Yoko Ono in December 1980 on the last day of Lennon's life. An original copy of the photograph, taken by Annie Liebovitz for Rolling Stone magazine, was auctioned on Oct. 19, 2010 in New York. (AP Photo/Swann Auction Galleries, Annie Liebovitz)

 

 

 Police examine entrance alcove to the Dakota Apartment Building in New York, Monday, Dec. 8, 1980 after John Lennon was shot and killed as he returned home to the building. Bullet holes can be seen in the glass in the door. (AP Photo/Handschuh)

 

 

 Yoko Ono, center, is aided by a policeman and David Geffen, right, of Geffen Records as she leaves Roosevelt Hospital in New York late Monday night, Dec. 8, 1980 after the death of her husband John Lennon. Lennon was shot outside his apartment in New York after returning from the recording studio. (AP Photo/Lyndon Fox)

 

 

 A crowd gathers at the scene in front of the Dakota apartments in New York City, where John Lennon was shot and killed, Dec. 8, 1980. (AP Photo/David Handschuh)

 

 

 A Beatles' fan sits outside John Lennon's apartment house in New York, Dec. 9, 1980, the night after Lennon was murdered as he entered the building. (AP Photo/Ray Stubblebine)

 

 

 Anchorwoman Jane Pauley of NBC's "Today" show, left, breaks down in tears at the end of a half-hour memorial tribute to musician John Lennon, Dec. 9, 1980, as Tom Brokaw looks on. Lennon was shot and killed the night before outside his apartment building. (AP Photo/Roberto Borea)

 

 A crowd gathers on the steps of the Lincoln Memorial in Washington, Dec. 10, 1980 for a vigil for John Lennon, who was slain in New York Monday night. (AP Photo/Charles Tasnadi)

 

 An unidentified man adjusts one of the wreaths that cover the wrought iron front gate to the Dakota apartment building where John Lennon lived until he was murdered as he entered. Fans continued to hold an impromptu vigil, Dec. 10, 1980. (AP Photo/Lyndon Fox)

 

 

 People jam the street at Central Park West and 72nd Street in New York, just outside the Dakota apartment house where John Lennon lived, Dec. 14, 1980, after leaving a memorial service held at the bandshell in Central Park, across the street. Lennon was murdered as he entered the building at left on Monday, December 8. Police estimated the crowd at 50,000 to 100,000. (AP Photo/David Bookstaver)

 

 

 An estimated crowd of 2,000 people gather in front of Trinity Church in Boston, Sunday, Dec. 14, 1980 for a ten minute silent vigil to honor the death of John Lennon. Songs of the former Beatle who was murdered in New York were played over a loud speaker system as the crowd milled around after the service. (AP Photo/Martell)

 

 A woman comforts a man who is crying, Dec. 14, 1980, in Seattle as the two took part in a somber memorial to John Lennon, who was murdered in New York, December 8. (AP Photo/Gary Stewart)

 

 

People participating in tribute to the slain musician John Lennon wave the peace sign and sing "Give Peace A Chance" at New York's Central Park, Dec. 14, 1980. An estimated crowd of 50,000 to 100,000 people took part in the vigil. (AP Photo/Carlos Rene Perez)

 

 

 Scenes during John Lennon tribute in New York's Central Park, Dec. 14, 1980. (AP Photo)

 

 

 Yoko Ono, widow of John Lennon, buries her face in her hands during ceremonies in New York's Central Park, dedicating a portion of the park as Strawberry Fields after the title of one of the ex-Beatles songs, Wednesday, March 21, 1984, New York. (AP Photo/Rene Perez)

 

 

 John Lennon of 'The Beatles' is seen here in December 1980. This image was taken just a few days before his assassination. (AP Photo)

 

 

 

This limited editon photograph entitled "Season of Glass", by Yoko Ono, taken in 1981 and printed in 1994, showing John Lennon's blood covered glasses from his assassination, placed on a table with a glass of water, and taken in the couple's Dakota apartment overlooking New York's Central park, was made available in London, Friday April 12, 2002, to be sold by auctioneers Bonhams in London, scheduled for April 17. The photograph, one of six, was expected to fetch between 8,000 and 10,000 Pounds (US$ 11,440 and 14,300) in aid of artists' charity. (AP Photo/Yoko Ono, Bonhams)