Ghanaian budding senior songstress, Sista Afia showed off her ‘dark’ nyash (I mean butt) at Wendy Shay’s concert. The ‘Weather’ star’s outfit was really something else. It was mixed with Cardi B, Nicki Minaj and blessed with Lady Gaga’s taste of flesh-showing designs. The dress covered all her body parts except her backside. The hard-working singer’s ass was really clear and visible …