I guess it doesn't really make sense to make a duplicate account to get only one more vote for Rihanna. No shade but it does sound like something a desperate stan would do.
Letter A Winner: Adele
Letter B Winner: Britney
Letter C Winner: Christina
Letter D Winner: Drake
Letter E Winner: Eminem
Letter F Winner: Florence + The Machine
Letter G Winner: Gwen Stefani
Letter H Winner: Hilary Duff
Letter I Winner: Inna
Letter J Winner: Janet Jackson
Letter K Winner: Katy Perry
Letter L Winner: Lady Gaga
Letter M Winner: Mariah Carey
Letter N Winner: Nicki Minaj
Letter O Winner: Oprah
Letter P Winner: Pink
Letter Q Winner: Queen
Letter R Winner: Robyn (Rihanna won but people were cheating and using duplicate accounts.)
Letter S Winner: Shakira