If she's aiming for spring then I would just push it to the summer.

May or June would be good. Single in March or April. I'd be here for that.
And, let's not forget, she's going to Sweden where Bloodshy & Avant are also from so we can assume that she's using Dr. Luke & Max but that doesn't rule out Bloodshy & Avant. Besides, what's wrong with working with them? Their all great producers. Dr. Luke might suck with other artists but his work on FF was very good.