Kendall Jenner is pleading the fifth. When asked why she didn’t join younger sister Kylie on the runway at Abbey Dawn by Avril Lavigne, the aspiring model was particularly tight-lipped. “I’m not talking right now. I can’t talk to you,” Jenner quipped, taking her front-row seat at Monday’s show. Sandwiched between frequent “Keeping Up with the Kardashians” guest star Jonathan Cheban, and Seventeen editor-in-chief Ann Shoket, Jenner quickly became all smiles as she chatted with the subsequent storm of journalists and photographers which, of course, included the Kardashian-obsessed E! cameras. During the show, Jenner emphatically sang along to the deafening melody of Lavigne’s own “Sk8r Boi,” raising her eyes from her cell phone only to snap a quick pic of Kylie.