The "Friends" stars really take the friendship thing seriously. Three of them got together to celebrate the Fourth.Courteney Cox and Jennifer Aniston shared food and drinks Sunday.Laura Dern was also a part of the action, posing with Courteney. They collaborated together on "The Monday Before Thanksgiving" in 2008.From 1994 to 2004, "Friends" was one of the most beloved sitcoms. It aired for 10 seasons. The show chronicled six friends' lives, their adventures, relationships, career struggles, and other humorous aspects.Courteney, Jen and Lisa have been very close ever since the show ended in 2004. Lisa has also been there from time to time. The reunion special that took place last May saw all six of them get together for an HBO special. This may have inspired the 4th soiree.