Leona Lewis

Last week's winner for best pic went to mom-to-be Hilary Duff, who looked super stylish in cut-off jeans.

Here are this week's top five celebrity pics... which one is your favorite? Cast your vote!

"X Factor" winner Leona Lewis tells "Extra" she'd make a good judge on "The X Factor" if Simon Cowell asked her to participate.

"I think I would do a good job," Lewis told "Extra" at Women's Cancer Research Fund event. "I've been through it, so I think I would do all right!" adding, "It's been 5 years since I won, so I think I've got a little bit of experience."

Watch her interview and hear what honorary chairwoman Rita Wilson has to say about the worthy event to supporting women's cancer research.

Halle Berry, Alicia Keys, Jamie Foxx and Leona Lewis were just a few of the A-list celebs who took part in Sunday night's Jenesse Center's 30th Anniversary Silver Rose Gala in Beverly Hills.

The Jenesse Center is a charity organization that helps families who have suffered from domestic violence. Oscar winner Halle Berry served as the chair of the event and said, "This year marks a major celebration for Jenesse and all the good work that our sponsors and supporters have enabled us to accomplish for the women and children who rely on our help."

"American Idol" judge Simon Cowell confirmed to reporters Wednesday night at the National Television Awards in London that he's in the process of securing acts for a charity single, the proceeds of which will aid the victims of last Tuesday's earthquake in Haiti.

Cowell has not yet confirmed who will participate on the track, but The Sun speculated that he would likely secure "X Factor" sensations Leona Lewis and Susan Boyle, with Beyoncé and Lady Gaga also mentioned as possibilities.

See more photos of Simon

Other celebs jumping on the charity music bandwagon include Quincy Jones and Lionel Richie, said to be working on a remake of "We Are the World," with all proceeds to go toward Haiti relief.

Check out more stars who give back!

Leona Lewis is smiling once again after she was attacked at a book signing earlier this month.

"It could have been worse," Leona tells UK Sky News. "I'm still alive, it's just something you have to deal with when you have fame, and the positives far outweigh the negatives."

Lewis, who just dropped her music video for "Happy," adds, "I don't like to dwell on the negatives, I'm a very positive person."

Lewis was signing copies of her autobiography "Dreams" on Oct. 14 when a man who had waited in line to get his copy signed punched her.

Despite the unprovoked violence, Lewis refuses to change the way she lives her life -- and revealed that while she doesn't have bodyguards, she does have people who "looked out" for her.

Check out Leona's full music video for "Happy" here.

Auf wiedersehen Germany -- Leona Lewis has pulled out of a scheduled appearance, still "badly shaken" after being punched yesterday at an in-store appearance in London.

"Leona was due to go to Germany today for promo but that has now been cancelled," the "Bleeding Love" singer's rep tells AP. "Leona is obviously shocked after yesterday but is OK."

The 24-year-old was signing copies of her autobiography in London yesterday when an "a guy came up and punched her to the side of the head," her rep told the press. The man was arrested after the attack.

Leona's rep added that the singer is still "badly shaken," but will be fine.

On Thursday, Lewis wrote on her web site, "Thank you so much for your support it is truly overwhelming. Yesterday was a horrible shock and left me extremely hurt and upset. I'm very sorry to those I wasn't able to meet at the signing. Thank you again for all of the lovely messages."