Rihanna's doppleganger is hella, ella mad at the AP and Yahoo for misidentifying her as RiRi at the Lakers/Magic game last night -- and now she's putting them on blast via her Twitter page.

Teyana Taylor -- who is one of Pharrell's singer protege's -- wrote:

"omgggggg if one more reporter say that im rihanna im gonna go crazzzzzzzzyyyyyyyyyyyyyyyyyyyy ... I wish the AP would do a little research. since wen am i RIhanna ... yahoo and everybody else just did a biggg f***in s**t"

Right, because it's a huuuuge stretch to think someone with a RiRi mohawk, wearing RiRi hipster shades and sitting one person away from RiRi's old boyfriend Chris Brown could possibly be RiRi.