What happens in Vegas doesn’t always need to stay in Vegas! Rocking a black mesh crop top and matching pants, Demi Lovato gave an unannounced performance of her new single, "Sorry Not Sorry," at XS Nightclub in Wynn Las Vegas on July 14.
The 24-year-old pop star was backed by The Chainsmokers, who were spinning a set as part of their Wynn Nightlife residency. After the surprise drop-in, Lovato parked herself at a stage table with her group of 20, which included BFF Nick Jonas, and later chatted with producer-DJ Diplo.
Lovebirds night out! Gwen Stefani and Blake Shelton celebrated a mutual friend's birthday at Beauty & Essex Los Angeles on July 26, enjoying delicious fare like avocado toast and surf and turf. As she is wont to do, the "Misery" singer Snapchatted the evening, especially her favorite detail of the restaurant: the ballerina wall.
Elizabeth Olsen stepped out in L.A. on the same night for the Wind River premiere, which was sponsored by FIJI Water in partnership with the Weinstein Company. The blonde beauty looked lovely in a black asymmetrical Roland Mouret floral dress as she posed with her tuxedo-clad co-star, Jeremy Renner. Wind River hits theaters on Aug. 4.
Bella Thorne was out and about in Beverly Hills, hanging out with newly single actor Max Ehrich at the iGo.Live event at the Beverly Wilshire Hotel on July 26.
An eyewitness tells ET that they hit the dance floor and sat next to each other at a dinner table, noting that the two "appeared in great spirits," and Ehrich even took pictures of Thorne at one point. The pair arrived at the event in the same car with Thorne’s sister and another guy, then left the party together.
Rosé all day! Emma Stone and a few of her friends got their sips on at the Kunde Family Winery in Kenwood, California, on July 9.
Celebs are just like us! Rumored couple Val Chmerkovskiy and Jenna Johnson were spotted unloading groceries while dressed in workout attire at a Whole Foods in West Hollywood on July 26.
Plenty of stars were in San Diego for Comic-Con, including James Van Der Beek, who stepped out in style in AllSaints' Vanuatu SS button-down while promoting his new Viceland show, What Would Diplo Do?.
Global Tiger Day is July 29, and tons of celebs, including Jaimie Alexander, Frieda Pinto, Ricky Gervais, Naomi Campbell and Debra Messing, have already lent their support for Discovery's Project C.A.T. (Conserving Acres for Tigers) on social media. Currently, there are fewer than 3,900 tigers left in the world and Project C.A.T. has partnered with the World Wildlife Fund to help double the wild tiger population by 2022, with Discovery agreeing to fund efforts to conserve nearly one million acres of protected habitat in India and Bhutan to protect and increase the wild tiger population.
Brandi Cyrus, Ava Sambora and Jasmine Brown were all in attendance for Forever 21's exclusive L.A. party for their new #WeAreForever Pre-Fall 2017 collection, celebrating individuality and inclusivity. The fun fête was hosted by hip-hop artist Leaf and featured a performance by Khalid.
Also hitting the party circuit was Calvin Harris, who hopped in the DJ booth at the treats! magazine Issue 12 release party, sponsored by Absolut Elyx, at the new Highlight Room on the roof of the Dream Hotel in Hollywood. The 33-year-old producer spun tunes for the surprised guests on the packed rooftop, which included Emile Hirsch, Scheana Marie, Chris Paul and Rick Fox.
On the opposite coast, 50 Cent hit up STK Downtown in New York City on July 26 for a quick bite with a female friend. The 42-year-old rapper kept his order simple during his second visit to the swanky steakhouse in two weeks: steak with a side of mac and cheese.
How sweet! Campers at Antonio Brown's ProCamp in Pittsburgh, Pennsylvania, gifted the Steelers wide receiver with a birthday cake made of Welch’s Fruit Snacks in honor of his 29th birthday on July 23.
Nashville star Charles Esten also had reason to celebrate, having just completed his #EverySingleFriday music milestone with a concert at the Country Music Hall of Fame's CMA Theater on July 19.
Karlie Kloss got her birthday shenanigans in early, arriving to Wall Miami at 1 a.m. on July 15 without realizing that six of her girlfriends had planned a surprise party -- champagne bottle parade and all!
Nearby, model Shanina Shaik kept it cool during Miami Swim Week, stopping by the #smartwatersummer pop-up at W South Beach on July 22.
Digital media company Uninterrupted celebrated their 3rd Annual After Party at Avenue Los Angeles, transforming the Hollywood hot spot into '80s and '90s nostalgia heaven so guests could enjoy a set by the Cleveland Cavaliers’ DJ Steph Floss and a surprise performance by Migos. During the soiree, David Beckham chatted with the New York Giants' Odell Beckham Jr, while Von Miller partied with fellow athletes John Wall, DeAndre Jordan and Baron Davis.
Sports Illustrated honored 2017 Fashionable 50 members -- including NBA MVP and SI's Fashion MVP Russell Westbrook -- at a star-studded event at Avenue in L.A. on July 18. Westbrook’s fellow Fashionable 50 2017 members like Kyrie Irving, Lindsey Vonn and Robbie Rogers were also on hand, as were SI Swimsuit models Kate Bock, Genevieve Morton, Tanya Mityushina and Bianca Balti.
Not only an actress, neuroscientist and environmentalist Mayim Bialik launched the Homoschlepiens campaign with SodaStream to bring awareness to plastic bottle pollution.
It’s nice to be out of those prison uniforms! Orange Is the New Black's Alysia Reiner treated herself to a day of pampering at New York's Haven Spa, indulging her senses with a signature facial.
During ESPY Award Week on July 11, Anthony Anderson hosted a private VIP experience created by Talent Resources Sports at Playboy’s global headquarters in Beverly Hills. He cracked jokes at the dinner table and was overheard talking about how excited he was to take his son to the J. Cole concert later that night. Also enjoying the party was former Playboy model Rachel Hunter and July playmate Dana Taylor.
Lily Kwong kicked off the first day of summer at the VIP Opening of Maison St-Germain on NYC’s High Line on June 21. To celebrate the thousands of delicate elderflowers harvested once a year to create St-Germain French liqueur, the model-turned-landscape artist created a geometric hedge maze and canopy of fresh flora and fauna.
Celeb-beloved poet Atticus put on a poetry reading from his first book, Love Her Wild, at The Last Bookstore in Downtown L.A., but he kept his identity a secret by wearing a mask. The next day, he was spotted on a motorcycle with one of his muses, Emma Roberts.
For even more star sightings, click through the gallery below.