The Bring It On star has already raised $20,000 (£13,300) by selling screen costumes and designer outfits on auction website eBay.com and is capping off the sale by offering up a conversation via internet conferencing service Skype.
The highest bidder will have 10 minutes to grill the star on her career and personal life, with proceeds going to help underprivileged children attend a Massachusetts-based summer camp.
She says, "One of the benefits of being an actress is all of the fancy clothes that you get sent. But everybody has to clean out their closet now and again so I'm taking this chance to let my fans go shopping in my closet while benefiting my favourite charity at the same time. Camp Hale is a summer camp in Boston that fosters individual development through outdoor programmes and education. My family at Camp Hale thank you!"