Singer Elton John urged fans at a Massachusetts concert not to buy an unauthorized biography of John Lennon.

"This is John Lennon's birthday; think of him this evening, and not me," John told the sold-out crowd at Worcester's Centrum Arena on Sunday after he went on stage for his third encore. Sunday would have been the slain ex-Beatle's 48th birthday."Always remember that John Lennon left us a legacy of wonderful music . . . but don't buy the book," John said.

The singer was referring to Albert Goldman's "The Lives of John Lennon," which characterized Lennon as an anorexic bisexual addled by drugs.