Russell Brand and Katy Perry
01/12/2011 at 04:00 PM EST
Viva, Katy & Russell! Newlyweds Katy Perry
and Russell Brand
took in Cirque du Soleil's Viva Elvis
show at Las Vegas's Aria Resort & Casino along with 15 friends and family members. Joining the group: Perry's grandmother, who was celebrating her 90th birthday. The party drank wine and were on their feet, cheering along to "Hound Dog" at the end of the show before continuing the birthday celebration elsewhere.
He may be hooking up with Natalie Portman
in their new movie No Strings Attached
, but Ashton Kutcher
was sticking by wife Demi Moore
after the film's premiere at Whiskey Blue in L.A. The pair acted super-affectionate, and hung close at their afterparty, sipping drinks and chatting with guests like daughter Rumer Willis
. Meanwhile, mom-to-be
Portman was celebrating – with a grilled cheese sandwich!
and hubby Jason Hoppy
shared a date night with another couple at Abe & Arthur's in New York City. The reality star showed off her svelte figure in a red silk dress, and the chatty foursome cozied up over a bottle of red wine.
star Adrian Grenier
dining on traditional dishes like guacamole and tuna ceviche during a low-key group dinner at Dos Caminos
in New York's Meatpacking District.
By LINDSEY GILBERT, MARK GRAY, CARLOS GREER and KATE HALLETT