That's the least she could do since Rita talks about her every single time. I'm sure it would make her day, that's the first time she is featured on her tumblr and she even met Rita's sister and her mother.
Cute.
I wonder why she never did this with rihanna.
Maybe she actually saw her as competition.
Did she had a tumblr when she debuted? Didn't she say on tv Umbrella was her fave song of the year? Didn't she also include "man Down" in her top 5 favorite song of lat year?