This track had SMASH written ALL over it from the get-go, yet Katy still went with Unconditionally... one of the worst moves she's made, tbh. It was never going to do any better than her previous slower singles, The One That Got Away and Wide Awake. Perhaps she'll learn that for next era.
I really don't think Shakira and Rihanna are much of a threat after hearing the snippet of the song. Katy should be worrying about Aloe and Bastille. New artists always slay so hard on their first try (if you don't count Wake Me Up for Aloe).