Chris Brown has been accused of badly injuring a 24-year-old girl inside an Orange County nightclub Saturday night ... and the alleged victim says it was so violent she might need surgery. Deanna Gines tells TMZ ... she was in the VIP section with Chris at Heat Ultra Lounge in Anaheim -- where he had just performed. When the bar was about to close, she claims Chris shoved her to the ground. Get more deets HERE!