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Jeff Vespa/Getty Images
Paris Hilton & Casey Johnson
An heiress to the Johnson & Johnson fortune, Johnson wasn't a household name, but her social circle included plenty of boldfaced names. Among them were Paris and Nicky Hilton, who was godmother to Casey's adopted daughter, Ava Monroe.
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Donato Sardella/Getty Images
Nicole Richie & Casey Johnson
Beverly Hills, 2005
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Lester Cohen/Getty Images
Nicky Hilton & Casey Johnson
Los Angeles, 2006
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Michael Buckner/Getty Images
Tila Tequila & Casey Johnson
Hollywood, 2009
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Mark Sullivan/Getty Images
DJ AM & Casey Johnson
Newport, R.I., 2006
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Amy Graves/Getty Images
Tara Reid, Casey Johnson & Daughter Ava Monroe
Beverly Hills, 2008
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John Shearer/Getty Images
Bijou Phillips, Nicole Richie, Nicky Hilton & Casey Johnson
Beverly Hills, 2005
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Seth Browarnik/Red Eye Productions
Casey Johnson, Courtenay Semel, Brittny Gastineau, Fabian Basabe
Los Angeles, 2008
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Michael Bezjian/Getty Images
Courtenay Semel & Casey Johnson
Park City, Utah, 2009
Still trying to catch up on Casey Johnson? Here are five things you need to know about the heiress.