She lost weight to become so slim, wore her hair longer, got the similar tattoo and even dressed like her for the Halloween.
They say the reason is Rihanna can't understand why Chris would choose Tran over her and feels it has to do with the physical appearance of Karrueche..
Check out the tattoos after the jump
Karrueche's dragon tattoo in 2012
Rihanna got hers in 2013