Robert Pattinson concert jay z heans twilight hoodie bra-ess no bra nipple see through
Robert Pattinson concert jay z heans twilight hoodie bra-ess no bra nipple see through

Robert Pattinson kept his head down as cameras snapped him leaving the Jay Z/Justin Timberlake concert Sunday night in LA, with a Aussie chanteuse Sia, 37.

The two hid their faces but see-a bit too much of Sia -- her headlights were on full beam! The braless babe wore a long, black kaftan with leggings and black high-tops while Rob sported his usual baseball cap with a black leather jacket and jeans.

Where was Kristen Stewart? Where was Riley Keough? Could Rob actually be getting it on with Sia???