Celeb Sightings: Kendall and Kylie Jenner Strike a Pose at PacSun

Kendall Jenner and Kylie Jenner
Kendall and Kylie Jenner celebrated their exclusive PacSun summer collection with an in-store appearance at the Third Street Promenade in Santa Monica, Calif.  Dan Steinberg

Kendall and Kylie Jenner celebrated their exclusive PacSun summer collection with an in-store appearance at the Third Street Promenade in Santa Monica, Calif.

Taylor Swift danced on the side of the stage as boyfriend Calvin Harris spun at the Sweetlife music festival in Columbia, MD.

Louise Roe signed copies of her new book Front Roe at the opening party for the new UNOde50 Boutique in the King of Prussia Mall.

Carla Facciolo and rumored boyfriend Franco Porporino had dinner at his eatery Franco da Fresco in Montclair, N.J.

Alessandra Ambrosio wore the GEORGE LOVES Spring Grey Small Stripe V Neck Tee while on the beach in Rio de Janeiro, Brazil.

50 Cent poured EFFEN Vodka into partygoers' mouths from his upper level bungalow at Encore Beach Club at the Wynn Las Vegas.

Carmelo Anthony celebrated his 31st birthday with wife La La Anthony at Avenue in NYC.

–Warwick co-owners JT Torregiani and Sylvain Bitton joined their friends Ross Naess, Diana Ross, and Evan Ross for a family night at Warwick's Summer 2015 Preview in L.A.

Hilary Duff

Hilary Duff smiled for photographers after picking up some essentials from Eddie Bauer in L.A.

Megan Fox and the cast of Teenage Mutant Ninja Turtles went out for dinner at Tao Downtown in NYC.

Sofia Vergara got motivated to work out on her Peloton bike at her home in L.A.

Miles Teller watched music side-stage with girlfriend Keleigh Sperry at BottleRock Napa Valley, Calif.

Nick Young faced off against Tyga during the Celebrity Basketball Spectacular game to benefit Sports Spectacular and hosted by LA Gear at Equinox gym in L.A.

Neil Patrick Harris surprised boyfriend David Burtka with a birthday cake on the stage of Burtka’s play It Shoulda Been You on Broadway in NYC.

Bill and Hillary Clinton headed backstage to visit with the cast after watching a performance of American In Paris on Broadway in NYC.

How to Be Single costars Rebel Wilson and Leslie Mann played around in the dugout before Sunday afternoon’s Mets game against the Miami Marlins in Queens, N.Y.

Katharine McPhee refueled on sushi and wine at Blue Fin after dance rehearsals for the upcoming Smash reunion in Times Square, NYC.

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!