Looks like Whitney Houston and Bobbi Brown’s daughter, Bobbi Kristina, is all ready for the warm weather. The 21-year-old posted a few bikini flicks onto her Twitter page that left the world astonished at how skinny she is, immediately drawing a bunch of red flags. After concerned tweets started rolling in regarding her size, B.K. fired back ASAP with a seemingly valid explanation as to why she’s so tiny. Head over to the gallery and take a look for yourself.