Jessica Inspires Justin (And His Mom!) Amber De Vos/PatrickMcMullan; Frank Micelotta/PictureGroup via AP IMAGES

When designing William Rast’s biker-inspired fall collection, Justin Timberlake had one celebrity in mind—his girlfriend Jessica Biel! “I always have one celebrity on my mind. I think it’s pretty obvious, isn’t it?” he told us backstage before the show, motioning to the lounge where Biel and his mother, Lynn Harless, were hanging out. But he’s not the only one who finds the actress inspiring. Harless, who sat front row next to her husband Paul and Biel, is also captivated by the Valentine’s Day star. “Just look at her! How can you not be inspired? She just climbed Mt. Kilimanjaro!” Harless told us. “At Christmas time, I heard this sound in my gym and saw Jessica. She was on the treadmill running as fast as she could go with a 40-pound backpack. I was like, ‘Okay, she’s amazing!’”

Enid Portuguez, with reporting by Nakisha Williams