Celebrity Star-Studded: The Best Parties This Week By Jonathan Borge Jonathan Borge Instagram Twitter Jonathan Borge is a writer and editor living in New York City. His writing has appeared in Glamour, Refinery29, Forbes, and PAPER, among other publications. Plus, he's held staff positions at Marie Claire, InStyle, and OprahDaily.com. Currently, he's the Senior Entertainment Editor at Bustle Digital Group's Elite Daily, where he oversees digital covers, features and profiles, freelance essays, and strategy for the site's TV/Movies and Celebrity and Music sub-verticals.He primarily writes about pop culture and style, and has a passion for telling LGBTQ+ and Latinx stories. When he's not working, he's likely waiting for Lady Gaga to announce her next tour. InStyle's editorial guidelines Updated on September 1, 2017 @ 05:30PM Pin Share Tweet Email Photo: ohn Sciulli/Getty Believe it or not, New York Fashion Week is less than a week away and with it will come some of the hands-down best celebrity-packed events of the year. And while the social scene has been pretty quiet this summer, things slowly began to pick up last Saturday, when Jeremy Scott hosted friends in L.A. for the launch of his new collaboration with UGG. A major Scott muse, Katy Perry was of course on hand, along with Jasmine Saunders and Paris Jackson. If you haven’t checked out the collection, it’s pretty glitzy. On Sunday, a similar crowd headed to watch Perry host the Video Music Awards. After the show, stars flocked to several after-parties, though it was the Republic Records and Cadillac party, hosted in part by Fiji Water, that had the most star-power. Guests included Millie Bobby Brown, Shawn Mendes, Hailee Steinfeld, and DNCE. Later, Reese Witherspoon continued to promote her new romantic comedy, Home Again, this time with a twinning red carpet moment with her daughter Ava Phillippe in L.A.. Back in New York, Shania Twain revved things up at the opening ceremony of the U.S. Open, where Katie Couric and Vera Wang were also fabulously on hand. VIDEO: Katy Perry Says Donald Trump "Retriggered" Her Sexual Liberation Scroll down for the best parties of the week. 01 of 11 Paris Jackson, Jeremy Scott, and Jasmine Saunders Donato Sardella/Getty at the Jeremy Scott x UGG collection launch party. 02 of 11 Jeremy Scott and Katy Perry Donato Sardella/Getty at the Jeremy Scott x UGG collection launch party. 03 of 11 DNCE Jonathan Leibson/Getty at the Republic Records, Cadillac, and Fiji Water After-Party. 04 of 11 Millie Bobby Brown and Shawn Mendes Jonathan Leibson/Getty at the Republic Records, Cadillac, and Fiji Water After-Party. 05 of 11 Hailee Steinfeld Jonathan Leibson/Getty at the Republic Records, Cadillac, and Fiji Water After-Party. 06 of 11 Heidi Klum and Mel B Jonathan Leibson/Getty at the Republic Records, Cadillac, and Fiji Water After-Party. 07 of 11 Shania Twain Mike Stobe/Getty at the opening ceremony of the U.S. Open. 08 of 11 Katie Couric Jim Spellman/WireImage at the opening ceremony of the U.S. Open. 09 of 11 Vera Wang Jim Spellman/WireImage at the opening ceremony of the U.S. Open. 10 of 11 Reese Witherspoon and Lake Bell Alberto E. Rodriguez/Getty at the L.A. premiere of Home Again. 11 of 11 Reese Witherspoon and Ava Phillippe Jason LaVeris/FilmMagic at the L.A. premiere of Home Again.