1 of 20
Beyoncé commands the stage while performing Thursday night during the Chicago stop of her On the Run concert.
2 of 20
A beaming Chloë Grace Moretz snags a photo opp with Channing and Jenna Dewan-Tatum Thursday in at Comic-Con's mtvU Fandom Awards in San Diego.
3 of 20
Hilary Duff happily snaps a few selfies with fans Thursday while celebrating the release of her new single "Chasing the Sun" at New York's Marquee nightclub.
4 of 20
Ring the alarm! Gabrielle Union and Dwyane Wade find a fellow Beyoncé and Jay-Z fan in Steven Tyler at the On The Run tour at Chicago's Soldier Field on Thursday.
5 of 20
6 of 20
MAN IN BLACK
Justin Theroux channels his dark side (with a smile!) before an appearance on Jimmy Kimmel Live! Thursday in Hollywood.
7 of 20
Kellan Lutz brings his smoldering good looks to the first-ever mtvU Fandom Awards during Comic-Con Thursday in San Diego.
8 of 20
PARTY OF TWO
Also at Comic-Con: Megan Fox buddies up with Will Arnett to play some games on the Xbox One in the Microsoft VIP Lounge.
9 of 20
Katie Holmes looks darling in a delicate lace dress at the World Surf League cocktail party in New York City on Thursday.
10 of 20
STORM OF SWORDS
Nikolaj Coster-Waldau and Natalie Dormer of Game of Thrones display their epic sword skills at the mtvU Fandom Awards during Comic-Con in San Diego on Thursday.
11 of 20
Jennie Garth shows off her colorful side – look at that turquoise blazer! – on a cloudy New York City Thursday.
12 of 20
SAVED BY THE SELFIE
Slater and Jessie – er, Mario Lopez and Elizabeth Berkley – have a Saved by the Bell reunion on the set of Extra in Universal City, California.
13 of 20
KEEPING UP APPEARANCES
Alright, alright! Matthew McConaughey takes the stage during the Paramount Studios presentation at Thursday's Comic-Con.
14 of 20
What a nightmare! Jack Black braves vampires, zombies and ventriloquist dummies at Comic-Con's Goosebumps panel Thursday in San Diego.
15 of 20
Holy smokes! Chris Pratt looks jaw-dropping hunky at the premiere of his film Guardians of the Galaxy at Empire Cinemas in London on Thursday.
16 of 20
17 of 20
BIRD IS THE WORD
My, your date looks mighty cuddly! Benedict Cumberbatch poses with a character from The Penguins of Madagascar (he voiced one of the film's characters) during the first day of Comic-Con International on Thursday in San Diego, California.
18 of 20
I COME IN PEACE
Also at Comic-Con: Kiefer Sutherland, who joined a panel discussing his TV series, 24: Live Another Day, on Thursday.
19 of 20
Hot date night alert! Elsa Pataky and husband Chris Hemsworth look dashing in matching Dolce & Gabbana frocks at London's Thursday premiere of Guardians of the Galaxy.
20 of 20
No one wears metallic-finish skinny jeans like Victoria's Secret model Rosie Huntington-Whiteley, the new face of Paige Denim, at the fashion brand's launch at Selfridges department store Thursday in London.
How Stars Dressed Up for Halloween Before They Were Famous
The Pop Culture-Inspired Costumes You Should Definitely Skip This Halloween
Watch Julianne Moore, Emma Stone and Melissa McCarthy Urge You to Demand Stricter Gun Laws