Beyonce Knowles tones her butt by walking up stairs. The "Halo" singer admits she was born with a "naturally good" rear end, but gives nature a helping hand by climbing flights of steps.

The 27-year-old singer explained: "I guess my butt is natural. But I go through stages like every woman. I like being curvy but sometimes I get curvy in the wrong places."

Ciara tried to lose weight on a cayenne pepper diet. The "Love Sex Magic" singer attempted to follow in the footsteps of Beyonce Knowles by cutting out fatty foods and consuming only liquids.

However, the drastic regime proved too much to maintain and Ciara was soon missing her favorite meals.

Jessica Simpson feared she was "hallucinating" when she was caught in an earthquake. The singer-and-actress was in Japan to film her new reality TV show "The Price of Beauty" when the ground was rocked by the tremor, which measured 6.6 on the Richter Scale.

She wrote on her Twitter page: "Thought I was hallucinating. I have never felt anything like this in my life. Laying in bed watching CNN."

Katy Perry gets turned off by men with bad breath. The "Hot N Cold" singer - who is in an on-off relationship with Gym Class Heroes rapper Travis McCoy - would never date a guy who doesn't keep his mouth clean.

She wrote on her Twitter page: "I mean, ladies, how many times did u think that guy was hot but just couldn't deal w/ his breathe? Sense of smell is most important! Agree?"

Jay-Z is writing a novel. The hip-hop mogul is set to write a book, but his wife Beyonce Knowles insists it's not an autobiography as he would never divulge secrets about their relationship.

She said: "I think he's doing a book - but it is not a biography."

Ciara says it is Justin Timberlake's responsibility to make sure Michael Jackson's memory lives on.

The "Love Sex Magic" singer insists it is down to stars of her generation - including the "SexyBack" hitmaker, who has copied many of Jackson's trademark dance moves - to embrace the musical legacy of the pop icon, who died of a suspected cardiac arrest last month.