Lisa Marie Presley has blasted critics for blaming John Travolta's teenage son's death on Scientology. The 40-year-old singer, who is close friends with fellow Scientologists John and wife Kelly Preston, argues it is in poor taste for people to use the tragedy to attack their beliefs.

Lisa said on her MySpace blog: "For the most part, people have been very sympathetic and respectful, but there are those certain ones that want to use this horrible tragedy as an opportunity to once again, blame and or attack Scientology?"

Oprah Winfrey, Tom Hanks and Tom Cruise are among the stars who have sent their condolences to John Travolta and Kelly Preston.

The couple have been left devastated following the death of their 16-year-old son Jett, who passed away on Friday, but their friends have been quick to offer support.

A letter written by Britain's late Princess Diana on her honeymoon is set to be auctioned. The princess wrote to royal footman Mark Simpson two days after her July 1981 wedding to Prince Charles to thank him for looking after her while she stayed at London's Buckingham Palace during the run up to her big day.

In the note - which is expected to fetch up to $5,200 when it is sold at auctioneers Reeman Dansie in Colchester, Essex - the princess admits feeling "terribly lonely" in the days before her wedding.

John Travolta says he's "in touch with his inner dog." John - who voices the main canine character in forthcoming Disney movie "Bolt" - says despite being a veteran of voiceover work, it was completely different to previous roles.

John, 54, explained: "Fortunately I'm already in touch with my inner dog, but it is a new process for me. Our director and his partner really helped me, guided me, through this process, because it's to some degree a leap of faith."

Zac Efron's mother was left devastated when she heard a rumor her son had died. The "High School Musical 3: Senior Year" star was the victim of an inaccurate story published by a foreign newspaper claiming he had been killed.

He said: "I was really shocked to find out - and my mom was really upset too when I called and told her."