Revealing Video: Casey Johnson with Daughter Ava

ET has footage of the late Casey Johnson with her adopted daughter Ava at a 2008 Beverly Hills event where she says, "Just because you have money … doesn't mean that you come without problems or difficulties in your life."

The 30-year-old Johnson & Johnson heiress, who was found dead in her Los Angeles home this past Monday, was with her adopted daughter in her Beverly Hills home on February 21, 2008 when she spoke out at a celebration brunch in honor of the publication of Inheriting Beauty. Joan Collins and Tara Reid were just a few of the celebrities attending the event organized by Casey and Montblanc International.

"I'm diabetic, and I wouldn't wish that upon anybody in the world because it's a very difficult disease to deal with," said Casey. "People think that money can buy happiness, and I'm not saying that I'm unhappy, because I'm not -- I'm very happy. It makes the linens nicer that you sleep on, it makes the house nicer, but it certainly does not buy happiness."