Battle of necklines: Selena Gomez vs Kim Kardashian

Selena Gomez  attends the Carine Roitfeld Party in Paris. (AFP)

Pic: AFP

Kim Kardashian attends the Carine Roitfeld party in Paris. (AFP)

Kim Kardashian and Riccardo Tisci  pose at Carine Roitfeld & Stephen Gan celebration of the launch of CR Fashion Book N.5 in Paris. (AP)

Kim Kardashian (AP)

Miranda Kerr attends CR Fashion Book Issue N°5 : Launch Party as part of the Paris Fashion Week Womenswear Spring/Summer 2015. Pic: Getty Images

Paris Hilton and her sister Nicky attend the Carine Roitfeld Party in Paris. (AFP)

Rosie Huntington-Whiteley poses at Carine Roitfeld & Stephen Gan celebration of the launch of CR Fashion Book N.5 in Paris. (AP)

Olivia Palermo attends the CR Fashion Book Issue N°5 launch party as part of the Paris Fashion Week Womenswear Spring/Summer 2015. Pic: Getty Images