updated 07/29/2010 AT 3:00 PM ET
•originally published 07/30/2010 AT 3:30 PM ET
A dressed-up Lauren Conrad arrived early to MyStudio in L.A. to support a friend who was deejaying at the popular nightspot. The reality star and her friends took over a table by the deejay booth and immediately began chatting and giggling with each other. They also cheered when their favorite song – “California Gurls” by Katy Perry – was played. Conrad, who rarely hits the clubs anymore, said hi to friends after taking a lap around the room, and also requested songs from her pal at the turntables.
Emmy nominee Jon Hamm and his Mad Men castmates January Jones, Christina Hendricks and John Slattery, celebrating their new season with a bash at Yxta Cocina Mexicana in downtown L.A. Hamm was looking dapper as ever, and was seated near Slattery at a private table, where they drank margaritas.
Ashton Kutcher is still focused on his fitness! The actor, in all white, took an early evening jog alone down L.A.’s Runyon Canyon.
Heather Locklear, picking up a late-afternoon lunch at Greenleaf Gourmet Chopshop in Beverly Hills. The actress, who was with two friends, grabbed a turkey sandwich – plus two salads – to-go, lingering on the restaurant’s patio before hitting the road.
Chloe Sevigny polished off an early dinner of salad on the patio of West Hollywood’s Chateau Marmont. She also sipped a clear beverage from a wine glass, using a straw, as she chatted with her male dinner companion before taking off around 9 p.m.
By JENNIFER GARCIA and MARLA LEHNER