Are Nicole Scherzinger and Lewis Hamilton engaged??

The singer and her racing driver beau have been together off and on say 6 years! and they were recently photographed as they cosied up at the annual amfAR Cinema Against AIDS gala held at the famous Hotel du Cap-Eden-Roc in  France 

Now this photo below I have looked at from all angles..are they trying to say something?? or just sending us the subliminal message like cmon cant you see her finger?? or is it me just hoping he has actually proposed..lol..

whatever the case I sincerely think Lewis should put a ring on it..if he hasnt already..

Gorgeous gown!