Justin Timberlake and Cameron were reunited at the Whiskey Bar in West Hollywood Friday night. Witnesses told People.com that JT was there with director Martin Scorsese's group, and about 1am Cameron walked in, and the two stood and talked for a little while.

"They weren't kissing or holding hands or anything, but they were being very friendly," the observer adds.

After about 30 minutes the two left the bar together. According to the observer, Diaz was barely recognizable and very low key, with her hair pulled back, and acting very low-key.

Labels: Cameron Diaz, Justin Timberlake