Elton John has reopened his feud with Madonna

Sir Elton John has reopened his feud with Madonna by suggesting she will not be singing live during the half-time show at America's biggest sporting event.

After his recent spat with the Queen of Pop at a film awards ceremony, the 64-year-old star was asked what advice he had for her when she appears at this Sunday's Super Bowl.

"Make sure you lip-synch good," he said mischievously.

The comment to Madonna, a singer who prides herself on performing live, is likely to drive an even bigger wedge between two of the music industry's most successful stars.

Being chosen to sing at the Super Bowl, which attracts a worldwide audience of over one billion, is considered a highlight of any artist's career.

Madonna is expected to sing four songs in a stage show that includes acrobats from Cirque du Soleil.

The 53-year-old always sings live at her concerts unlike other artists who lip-synch to a backing track.

John's comments, made on the Good Morning America TV show, will anger Madonna, who has spent the past fortnight rehearsing for her 12-minute appearance.

His jibe also reignites the bitter feud between the pair that surfaced last month when both stars were nominated for a Golden Globe award for Best Original Song. John fired the first shot by saying Madonna didn't have a "[expletive] chance of winning" for her song Masterpiece, from her film W.E..

When Madonna scooped the award, John's partner David Furnish took to Facebook to pour scorn on her victory.

"Madonna winning Best Original Song truly shows how these awards have nothing to do with merit," he wrote.

Furnish later tried to calm matters down by apologising for his rant.