In this week's A-List Insider:

The original material girl is coming to the X Factor! Yes you heard right Simon Cowell is this close to signing up Madonna herself to perform on the talent show and we can't wait!

According to the Sun, Simon is hoping that this once in a lifetime performance will help boost the ITV shows ratings, which have dropped big time since the music mogul left the judging panel in 2011.

An insider said: "There are a lot of big names releasing music at that time, but she's absolutely the number one name we are trying to secure.

"She needs her next album to be a success in the UK and a performance on ITV in front of 12 million people would be the best platform."

There's only one way to celebrate this sort of news - vogue and vogue and vogue

And over in the world of fashion, three generations of beauties are werking it big time.

Rihanna joins supermodel royalty Naomi Campbell and Iman in a photoshoot for W magazine

The stunning images show the supermodels and pop-star wearing pieces from Balmain's Fall 2014 collection.

"These women are inspiring to so many different people," said Balmain's 28-year-old creative director, Olivier Rousteing. "Bringing them together represents the concept I'm working toward."

We may have just witnessed one of the most iconic moments ever.

And on a tragic note, Robin Williams has passed away. The Oscar-winning funnyman was found dead at his San Francisco home on Monday night. He was 63 years old.

The Marin County Sheriff's Office said the actor-comedian appears to have committed 'suicide due to asphyxia.

News of his tragic death rocked Hollywood with stars from across the globe paying tribute to the Mrs Doubtfire star.

Steve Martin said he was "stunned by the loss of Robin Williams, mensch, great talent, acting partner, genuine soul"

And President Obama issued a statement describing the Good Will Hunting star as "one of a kind".