He might be smiling inside -- but there's no way Robin Thicke is happy camper.

The controversial singer tried to put on a smile when he arrived at the famed Hotel Le Meurice in Paris -- but after critical and commercial failure of his latest album Paula -- a bizarre ode/sad attempt to win back his estranged wife Paula Patton -- we're shocked to see such a happy face.

According to Billboard, Paula tanked in the U.S. -- selling a mere 25,000 albums its first week. As a reference point, Blurred Lines debuted with 177,000 in sales. Apparently the Brits really aren't digging Robin's creepy attempt and getting back his woman -- the album sold a shocking 530 copies in the UK. Guess peeps aren't loving the semi-stalkerish vibe of the album. And we really can't blame them.

Hey Robby, how does getting your just desserts feel? #askthicke