London, Aug 30 - English singer Robbie Williams has been named greatest superstar of all time in a new poll by MTV.

The singer, who hasn't released a song since 2007, has beaten his Take That bandmates and Michael Jackson, reports celebrifi.com.

'This proves that Robbie is still a superstar in many people's minds,' said a source.

The news comes at a great time for Williams who is making a comeback with his new album 'Reality Killed the Video Star', which will be released later this year.