2268 %3D1425337355000%26v%3D2%26position%3D1%26chinavariant%3DFalse&utmmedium=10today.0302&position=1 &part=sl&china_variant=False> nytimes.com / BEN SISARIO Before a special audience in Los Angeles last week, the velvet-voiced pop singer Robin Thicke performed his 2013 hit "Blurred Lines," ran through a