Alessandra Ambrosio and Joan Smalls rock out with J Balvin and more star photos of the weekend

Armie Hammer, Joan Smalls and Wilmer Valderrama attended the MDL Beast Festival lunch in the historical city of Diriyah in Riyadh, Saudi Arabia on Saturday, December 21. The famous threesome had previously rocked out to J Balvin’s set the night before.

Speaking of J Balvin... the superstar lit up a celeb-filled crowd at MDL Beast Festival in Saudi Arabia on Friday, December 20. Plus, did you catch his and Maluma’s matching moment?

Alessandra Ambrosio was among that bunch at the MDL Beast Festival, looking cozy chic in soft hoodie, jacket and leather pants combo.

Harry Styles played a hilarious hidden camera pizza prank on The Ellen DeGeneres Show this week.

Ian McDiarmid, Keri Russell (popping in Mark Cross polka dots), Richard E. Grant, Daisy Ridley, John Boyega, Naomi Ackie, Kelly Marie Tran, Anthony Daniels, Oscar Isaac and Joonas Suotamo basked in the spotlight at the highly-anticipated world premiere of Star Wars: The Rise of Skywalker in Hollywood on December 16.

Kelly Ripa and Mark Consuelos know how to throw a holiday party. The power couple and Amazon celebrated the season of giving by hitting up Whole Foods Market and Amazon 4-star in NYC to gather festive essentials for a very special reason. Together, they delivered smiles to Women in Need (Win), the largest provider of family shelter and supportive housing in NYC, by throwing them an epic bash.

MORE: Kelly and Mark’s daughter shows off vocal chops in impromptu performance

Camilla Belle and her mother Deborah took a scenic stroll down the coast during their stay at Nobu Hotel Los Cabos in Mexico.

Tessa Thompson, Jacqueline Novak and Mark Ronson enjoyed the afterparty for the (re)opening night of Jacqueline’s Get On Your Knees at A.O.C. L’aile ou la Cuisse in N.Y.C.

We bet you’re not surprised to see the Christmas Queen out and about this week. Mariah Carey lit up the Empire State Building wearing a half-million-dollar Wempe necklace as she celebrated the 25th anniversary of her iconic song, All I want for Christmas is You.

Maluma took a pensive pause in Dominican Republic, where he performed at The Paradise music festival along with Bad Bunny.

Serena Williams hopped on down to the Boca Beach Club in Florida for Patrick Mouratoglou’s “Preseason.” The camp brings together tennis players preparing for January’s Australian Open and A-list people from the worlds of sports and entertainment, like Shaun T (pictured behind her).

Let’s go for a sleigh ride! Katy Perry had a sweet day out with Amazon at Boys & Girls Clubs of Metro Los Angeles’ decked out Bell Gardens Clubhouse. “I loved partnering with Amazon to deliver smiles to the Boys and Girls Club of Bell Gardens today,” the superstar said. “We had a magical time getting into the holiday spirit in a winter wonderland of holiday magic filled with Christmas songs and stories, presents and REAL SNOW in Southern California. It was the true definition of a Cozy Little Christmas.”

Mackenzie Ziegler spread some cheer at UCLA Mattel Children’s Hospital with music therapy. Her group met with several patients at their bedsides for a sing along, including several holiday-themed songs.

Katie Couric, Karlie Kloss and David Foster blended in black at the 4th Annual Berggruen Prize Gala celebrating 2019 Laureate Supreme Court Justice Ruth Bader Ginsburg in NYC on December 16.

Lea Michele and bestie Jonathan Groff got festive while performing on The Tonight Show Starring Jimmy Fallon.

Olivia Culpo was spotted at the fashionable Parker New York hotel this week. The model had a festive stay, checking out the iconic NYC Christmas decorations.

Lovebirds Justin and Emily Baldoni posed with Amanda Salvin after their conversation during the inaugural The Mothers Ball in NYC. The inspiring two-day event featured engaging discussions with thought leaders, authors, and celebrities at the Javits Center.