The Chime For Change event is taking place at London's Twickenham Stadium on June 1 and it will feature sets from the likes of Beyoncé and Florence + The Machine as stars raise awareness of women's rights and issues.

It was announced today (May 20) that a number of top names from entertainment and politics will help host the Gucci organised event, with Madonna leading the list.

Other names due to host include Archbishop Desmond Tutu, Gordon and Sarah Brown, Jessica Chastain, Gloria Steinem and Freida Pinto.

Speaking about the issues surrounding the event, Madonna said:

"60 percent of the children in the world NOT in school are girls! 2/3 of the world's illiterate are WOMEN! I Do NOT accept this. We need to change this and we WILL CHANGE THIS!"

Beyonce meanwhile said in a statement: "I am really happy that so many amazing artists and presenters have come together to support CHIME FOR CHANGE on 1 June. Our goal is to have a great time together while we unite and strengthen the voices of girls and women around the world."

Tickets for the event, which will also see the likes of Jennifer Lopez and Ellie Goulding perform, are on sale now.

The show was two judges down for a number of months after LA Reid and Britney Spears left following the 2012 series.

Former X Factor UK judge Rowland and The Voice Mexico star Paulina Rubio have now been confirmed to replace the outgoing judges and sit alongside the returning Demi Lovato. Simon Cowell said about the new appointments:

"It's taken more than a decade, but I'm delighted to finally be on a panel with three girls (I think!). Paulina and Kelly both have great taste and massive experience in the music industry and together with Demi, this is going to be a fun panel. It just feels like the time to do something different."

Rowland meanwhile said: "I am very excited to be reuniting with Simon Cowell and The X Factor family. It feels great to be able to take this journey here at home in the States."

Rubio added: "I love The X Factor! I can't wait to find the next big music star here in America. I'm so thrilled to be part of the show as a judge."

The first auditions for the X Factor USA will take place today (May 21) in Charleston, SC.

During a personal interview with Nightline, the 'Skyscraper' beauty explained that celebrities she looked up to were all very thin, which both created and fed an unhealthy expectation of her own body:

"When I was growing up, I had no-one to look up to in the spotlight that was a regular-sized girl. This was the time when socialites were very, very thin and were going to clubs, and that's what I had on my wall - I had pictures of these girls that were so tiny."

She also opened up about going to rehab and explained that she was at the point where it was her only option, but looking back she's glad she recognised that she needed help:

"I knew that I was in trouble and I knew that I couldn't do it on my own. The difference is now when I don't want to eat or I want to throw up after a meal, I tell somebody, and that instantly takes away the power of what that has on me if I were to do it."

Towards the end of the interview, Lovato added that if Lindsay Lohan ever needs support while she's experiencing a stay in rehab she would gladly help her: "I love Lindsay. She's one of my friends and I will always be there if she ever reaches out, but it's not my place to give her words of advice. I can't sit here and say that I am Miss Recovery, that I'll be that way for the rest of my life."

Watch a recent interview with Lovato below:

Speaking about the 'Halo' superstar's documentary film, 'Life Is But A Dream', in comparison with her own ('My Crazy Beautiful Life'), Ke$ha revealed that after watching it she was so impressed with her work ethic, talent and ability to show her true self to the world:

"I think she might actually be perfect. I show my flaws - they're real. I don't have a perfect body. It's important for girls to see that don't have to be perfect."

She also joked that her text-message based friendship with One Direction's Harry Styles is purely platonic as she's terrified of the group's fans:

"Oh no! He and I are just friends. Actually we started texting a long time ago and we're just friendly, it's not sexy. I hope the One Direction fans don't want to beat me up. I'm just a fan too."

Watch Ke$ha discuss her love of beards below:

Spice Girls have undergone similar treatment, with the musical Viva Forever in production.

Speaking to Digital Spy, Cheryl said that the idea of a Girls Aloud musical is "amazing" but she admitted she couldn't really see herself on stage performing. She said:

"That would be amazing! That would be funny. I can't imagine myself...Kimberley [Walsh] would be amazing because she's a theatre veteran now."

She continued: "It would be pretty amazing that someone could play those parts in the theatre. That would really be a compliment, I think."