Little sister syndrome: Pippa Middleton, Serena Williams, and Dannii Minogue
3:19 PM on 16th May 2011
Taking the lead: Pippa Middleton has been stealing the limelight from her previously more famous sister, Kate, the Duchess of Cambridge
All eyes on Pippa: It was Kate”s big day, but Pippa who became an internet sensation for her figure-hugging dress
Sister act: Dannii Minogue, right, now has a higher profile in the UK than sister Kylie thanks to her role on The X Factor and modelling for Marks & Spencer
Anything you can do, I can do better: Serena Wlliams, left, has played Venus at her own game and won (pictured here after winning the 2009 Wimbledon final)
Role model: Sasha Slater, left, followed big sister Lydia into a career in journalism