sumeke rainey and alexis phifer are two different people. both dated kanye west.
She is a designer, and she is Kanye's fiance
It depends on your point of view. But coming from me yes she can be one odd person.
The difference is that only Alexis's is correct. The possessive singular of all English nouns, regardless of spelling, is formed by the addition of -'s. Singular possessives sound as if they were...
She was the girlfriend of Kanye West.
I would go with "Alexis's sweet sixteen"