Ashlee Simpson-Wentz Celebrates Her Birthday At Wet Republic

Ashlee and Jessica Simpson appear at the Wet Republic pool at the MGM Grand Hotel/Casino as she celebrates her 25th birthday October 3, 2009 in Las Vegas, Nevada.

Jay-Z Celebrates The Grand Opening Of The 40/40 Club

Solange and Beyonce Knowles arrive at the opening of Jay-Z's USD 20 million 40/40 Club, a 24,000-square-foot sports bar and lounge at The Palazzo Resort-Hotel-Casino early December 31, 2007 in Las Vegas, Nevada.

Teen Choice Awards 2002 - Show

Britney Spears and her sister Jamie Lynn Spears at "The Teen Choice Awards 2002" at the Universal Amphitheatre in Los Angeles, Ca. Sunday, August 4, 2002. Photo by Kevin Winter/Getty Images/FOX.

5th Annual Runway For Life - Arrivals

Hilary and Haylie Duff arrive at the 5th Annual Runway For Life benefiting St Jude Children's Reshearch Hospital presented by Disney's "Tinker Bell' on DVD and Blu-ray on October11, 2008 at the Beverly Hilton Hotel, Beverly Hills, California.

Picturehouse Presents "A Prairie Home Companion" - After Party

NEW YORK - JUNE 04: Actress Lindsay Lohan (R) and sister Ali Lohan attend the after party for the "A Prairie Home Companion" premiere at the Hudson Hotel June 4, 2006 in New York City. (Photo by Evan Agostini/Getty Images)

WWD @ 100 Anniversary Gala

The Olsen twins arrive at the Women's Wear Daily 100 Anniversary Gala at Cipriani 42nd Street on November 2, 2010 in New York City.

Howie Dorough Birthday Celebration - Inside

Musicians Nick Carter and Aaron Carter, pose at the Howie Dorough of the Backstreet Boys and Promoter Dave Ockun Birthday Celebration party in aid of the Lupas Foundation at LAX nightclub, on August 16, 2006 in Hollywood, California.

(Credit: Getty Images)

Us Weekly Hot Hollywood Style Issue Event - Arrivals

Nicole and Paris Hilton in April 22, 2010 in Hollywood, California.

(Credit: Getty Images)

England v Algeria: Group C - 2010 FIFA World Cup

Prince Willian and Prince Harry during the 2010 FIFA World Cup South Africa Group C match between England and Algeria at Green Point Stadium on June 18, 2010 in Cape Town, South Africa.

(Credit: Getty Images)

US singers Joe (L), Kevin (C) and Nick J

US singers Joe (L), Kevin (C) and Nick Jonas, member of The Jonas Brother's group, are seen during a press conference in a hotel in San Jose on October 25, 2010.

(Credit: Getty Images)

Premiere Of CBS Films' "Beastly" - Arrivals

Kendall and Kylie Jenner (the half sisters of Kim, Khloe, and Kourtney Kardashian) on February 24, 2011 in Los Angeles, California.

(FILES) US pop star and entertainer Mich

Micheal Jackson kisses his sister Janet Jackson (L) after she presented him with the Grammy Legend Award at the 35th Annual Grammy Awards Febuary 24,1993. Michael Jackson died on June 25, 2009 after suffering a cardiac arrest.

2011 People's Choice Awards - Press Room

The Kardashian sisters pose in the press room during the 2011 People's Choice Awards at Nokia Theatre L.A. Live on January 5, 2011 in Los Angeles, California. Pictured from right to left are Kourntney, Khloe, and Kim.

(Credit: Getty Images)

ESPN The Magazine Next Party - Arrivals

Actors Jessica Alba (R) and her brother Joshua Alba arrive for the ESPN The Magazine Next Party during Super Bowl XL weekend February 3, 2006 at the Colony Club in Detroit, Michigan.

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2010 VH1 Hip Hop Honors - Arrivals

Singer/actress Brandy and her younger brother Ray J, who is also an entertainer, attend the 2010 VH1 Hip Hop Honors at Hammerstein Ballroom on June 3, 2010 in New York, New York.

(Credit: Getty Images)

Samsung's 9th Annual Four Seasons of Hope Gala - Arrivals

Singer Jennifer Lopez is seen here with her husband Marc Anthony, and sister Linda Lopez who is a journalist.

(Credit: Getty Images)

Actress and singer Miley Cyrus

Actress and singer Miley Cyrus arrives with her sister, actress Noah Cyrus (R) at the premiere of "Justin Bieber: Never say Never” in Los Angeles, California on February 8, 2011.

(Credit: Getty Images)

Miramax 2005 Golden Globes After Party

Actress Nicole Kidman (R) and her sister Antonia Kidman attend the Miramax 2005 Golden Globes After Party at Trader Vics on January 16, 2005 in Beverly Hills, California.

(Credit: Getty Images)

2011 People's Choice Awards - Backstage And Audience

Taylor Swift and her brother attend the 2011 People's Choice Awards at Nokia Theatre L.A. Live on January 5, 2011 in Los Angeles, California.

Actor Jaden Smith and his sister, singer

Actor Jaden Smith and his sister, singer Willow Smith (R) arrive at the premiere of "Justin Bieber: Never say Never” in Los Angeles, California on February 8, 2011.