Reese Witherspoon wore a sheer blue shirt on Thursday night when she had dinner with friends at The Tavern restaurant in Brentwood. Cameron Diaz was among the ladies who gathered for the meal, and she was seen waiting inside for her car to arrive as Reese faced the photographers. It was an evening out on the town for Reese, who has been busy lately spending time with her kids, Ava and Deacon, and husband Jim Toth. Reese is prepping to return to movie making in Jason Segel's Sex Tape, but for now is spending her days adding to her wardrobe at some of LA's most chic boutiques. Cameron, meanwhile, has been on set for Gambit and What to Expect When You're Expecting. Cameron has been catching up with girlfriends like Reese and Gwyneth Paltrow since splitting with boyfriend Alex Rodriguez a few months ago. New reports say Cameron Diaz is dating Diddy, but the two have been friends for years.