Celebrity SiblingsAshlee Simpson-Wentz Celebrates Her Birthday At Wet RepublicAshlee 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.
Celebrity SiblingsESPN The Magazine Next Party - Arrivals(Credit: Getty Images)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.
Celebrity Siblings2010 VH1 Hip Hop Honors - Arrivals(Credit: Getty Images)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.
Celebrity SiblingsSamsung's 9th Annual Four Seasons of Hope Gala - Arrivals(Credit: Getty Images)Singer Jennifer Lopez is seen here with her husband Marc Anthony, and sister Linda Lopez who is a journalist.
Celebrity SiblingsActress and singer Miley Cyrus (Credit: Getty Images)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.
Celebrity SiblingsMiramax 2005 Golden Globes After Party(Credit: Getty Images)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.
Celebrity SiblingsPremiere Of CBS Films' "Beastly" - ArrivalsKendall and Kylie Jenner (the half sisters of Kim, Khloe, and Kourtney Kardashian) on February 24, 2011 in Los Angeles, California.
Celebrity Siblings(FILES) US pop star and entertainer MichMicheal 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.
Celebrity Siblings2011 People's Choice Awards - Backstage And AudienceTaylor 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.
Celebrity Siblings2011 People's Choice Awards - Press Room(Credit: Getty Images)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.
Celebrity SiblingsUS singers Joe (L), Kevin (C) and Nick J(Credit: Getty Images)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.
Celebrity SiblingsJay-Z Celebrates The Grand Opening Of The 40/40 ClubSolange 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.
Celebrity SiblingsTeen Choice Awards 2002 - ShowBritney 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.
Celebrity Siblings5th Annual Runway For Life - ArrivalsHilary 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.
Celebrity SiblingsPicturehouse Presents "A Prairie Home Companion" - After PartyNEW 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)
Celebrity SiblingsWWD @ 100 Anniversary GalaThe Olsen twins arrive at the Women's Wear Daily 100 Anniversary Gala at Cipriani 42nd Street on November 2, 2010 in New York City.
Celebrity SiblingsHowie Dorough Birthday Celebration - Inside(Credit: Getty Images)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.
Celebrity SiblingsUs Weekly Hot Hollywood Style Issue Event - Arrivals(Credit: Getty Images)Nicole and Paris Hilton in April 22, 2010 in Hollywood, California.
Celebrity SiblingsEngland v Algeria: Group C - 2010 FIFA World Cup(Credit: Getty Images)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.
Celebrity SiblingsActor Jaden Smith and his sister, singerActor 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.