Well, nobody saw this coming!
Well... it's who he left the club with that's causing a stir:
WHAT is that creepy-looking mask doing on Rob's sexy face!?!
But luckily, the scary transparency eventually wore thin for KStew so she changed into a pink wig and some fun lil' shades at the Hollywood Forever Cemetery.
And yes, what you see with your eyes is true — they were totally holding hands. Adorbsies!!
[Images via AKM-GSI.]