Miley Cyrus, Rihanna, Fergie, Leona Lewis, Mariah Carey, Carrie Underwood, Mary J Blige, Beyonce, Natasha Bedingfield, Ashanti, among others (Excuse the billing!) perform for a charitable cause for cancer research in Just Stand Up to Cancer, a telethon aired over major American networks ABC, CBS, NBC and E!, Conde Nast Media Group’s Fifth Annual Fashion Rocks at Radio City Music Hall on September 5, 2008 in New York City.

Beyonce goes topless for an ad of her new fashion label, House of Dereon. Yes, she designs clothes too.

Beyonce Knowles went the topless route to show that her fashion label House of Dereon is for the seductive type too.

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Beyonce in Manila

People magazine’s annual best- and worst-dressed issue hits newsstands on Friday featuring numerous Hollywood stars, all given a nickname to describe their taste in couture.

Beyonce, 26, was dubbed “The Showstopper,” here’s her pic true to form of being a showstopper, in a photoshoot with boyfriend Jay-Z,her nipple slipped!”

Actress Cameron Diaz walked into the top 10 as “The Legs,” and actress Katie Holmes, who is married to Tom Cruise, graced the list as “The Classic.”

“Beyonce just looks amazing every time she goes out,” assistant managing editor Cynthia Sanz told Reuters. “She likes to show off her curves and she is very glamorous.”

Beyonce has her own fashion line, “House of Dereon,” that mixes hip hop influences with feminine touches like lace and ruffles that she launched with her mother, stylist Tina Knowles, in 2004.

Last year, former “Friends” star Jennifer Aniston topped the list after a reader’s vote, but this year the magazine did not seek readers’ input. Instead, the magazine’s editors drew up the list without giving the 10 winners rankings.

Other women in the top 10 included Penelope Cruz, Jessica Biel, Drew Barrymore, Jennifer Lopez, Reese Witherspoon, Gwen Stefani and Ali Larter.

For the men last year, singer Justin Timberlake was named “Trendiest,” and praise went to British soccer star David Beckham, who recently moved with wife Victoria to Los Angeles.

This year Beckham again made the list, alongside Terrence Howard, Johnny Depp, Brad Pitt and George Clooney.