National Lampoon's Christmas Vacation cast reunites, plus more great celebrity photos
Adam Lambert looked festive in his green suit during the L.A. stop of his Velvet tour.
It looks like Simon Cowell made a friend during his family vacation in Barbados.
Lizzo brought down the house during her performance on Saturday Night Live.
Eddie Murphy dropped by The Tonight Show ahead of his SNL hosting gig.
Eliminated Masked Singer contestant Ana Gasteyer — who had recently been revealed as the Christmas Tree —performed "Sugar & Booze" off of her new Christmas album during an appearance on Late Night With Seth Meyers.
Karamo Brown, Miss America 2020 Camille Schrier, Lauren Ash and Kelly Rowland
Tariq "Black Thought" Trotter, Jimmy Fallon, and the Sesame Street gang
In honor of the 50th anniversary of Sesame Street, Tariq "Black Thought" Trotter and Jimmy Fallon performed a rap number with Elmo, Big Bird, and more.
George MacKay, Dean-Charles Chapman, and Andrew Scott hit the Hollywood premiere of 1917.
Shawn Mendes rocked Monterrey, Mexico.
Melina Matsoukas and Reese Witherspoon
Michael B. Jordan and Jamie Foxx
Mariah Carey lit up the Empire State Building in celebration of the 25th anniversary of "All I Want for Christmas Is You."
Helen Hunt and Paul Reiser
John Mulaney and the Sack Lunch Bunch
John Mulaney spread some Christmas cheer with the Sack Lunch Bunch at a screening for their Netflix variety special in New York.
Saoirse Ronan and Timothée Chalamet
The Witcher cast
Like a Boss stars
Thirty looks purrfect on Taylor Swift! The pop star received a giant cat-themed birthday cake onstage during iHeartRadio's Z100 Jingle Ball concert in NYC.
Tyrese Gibson and Idris Elba
Sean Combs and Post Malone
National Lampoon's Christmas Vacation cast
Taylor Swift and Billie Eilish
Marvel Cinematic Universe stars like Tom Hiddleston assembled to honor Stan Lee's legacy during a taping for the ABC prime-time special Celebrating Marvel's Stan Lee.
Idina Menzel got everyone into the spirit during her Holiday Playlist Performance held at the Apple Store in New York City. The singer has been promoting her new album, Christmas: A Season of Love.
Two days before the release of Harry Styles' new album Fine Line, Spotify chose 40 of his biggest fans for a private listening party held at the Magic Castle in Los Angeles. Guests were treated to specialty cocktails and sashimi, while a puppet performance told the fables of Eroda from his "Adore You" music video. Styles soon appeared onstage for a short and sweet appearance before everyone got to bump to the full album.
Adam Sandler and The Weeknd
Danai Gurira and America Ferrera
Ava and Deacon Phillippe came out to support their mom, honoree Reese Witherspoon, at the Hollywood Reporter's Power 100 Women in Entertainment celebration in L.A.