Gwen Stefani: Plaid Lady in West Hollywood!

Gwen Stefani rocks a plaid L.A.M.B. outfit as she stops by CVS pharmacy with a friend on Wednesday (December 21) in West Hollywood, Calif.

The 42-year-old rocker then headed to Bristol Farms to do some grocery shopping.

PHOTOS: Check out the latest pics of Gwen Stefani

Gwen currently covers InStyle UK‘s January 2012 issue and chatted with the mag about one of her signature looks.

“When I was 17, my grandmother got me a gift pack with all these different-colored lipsticks and one of them was burgundy,” Gwen told the magazine. “I tried it on, looked in the rear-view mirror and said, ‘That looks good’. I’ve worn it ever since. The make-up goes on every day, even if I’m not going anywhere.”

10+ pictures inside of Gwen Stefani shopping in West Hollywood…