'LENNONYC' looks at the former Beatle's time living in New York
'I felt that by killing him I would become somebody,' he says
Patti Smith, Cyndi Lauper and Jackson Brown to honour late Beatle
Chapman will remain in prison for at least another two years
Yoko Ono is overseeing reissuing of back catalogue material
Mark Chapman is serving 20 years to life for murdering the Beatle in 1980
Fans are being invited to submit birthday wishes and personal thoughts for special project
Yoko Ono oversees the remastering of the star's back catalogue
Memorabilia from Michael Jackson, The Who and the Sex Pistols also went under the hammer at Christie's