CHRISTINA AGUILERA .at LACMA's "The Unmasking" The Lynda & Stewart Resnick Exhibition Pavilion Opening Gala at The Los Angeles County Museum of Art in Los Angeles, California, USA, September 25th 2010..portrait headshot make-up beauty tanned halterneck silk chiffon side .CAP/ADM/BP.©Byron Purvis/AdMedia/Capital Pictures.