The two friends were spotted out doing some shopping on Melrose Place in Los Angeles.
Cameron wore a summer print dress beneath her denim jacket while Drew wore a large hat, floral shirt an baggy pants.
The two women have been friends for a long time in Hollywood starring in movies like Charlie's Angels together.
Drew has been relying on her friends following the break-up of her marriage to Will Kopelman– with the couple sharing two young daughters Olive, 5, Frankie, 2.
Barrymore has not started dating again, saying recently: "What I do want is girlfriend time."
Cameron Diaz is still happily married to rocker Benji Madden but still made time to see her friend.
The actresses spent time browsing local shops and looking at the latest in summer fashions.
Diaz got married in 2015 and her husband has helped her change her views on both marriage and relationships. She said: "We women are objectified so much. Somehow my husband has just been able to kind of show me what it's like not to have that be a part of a relationship, and being an equal."
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