An insider spilled the tea somewhere else here

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THe song was originally titled "Beg For It" but Iggy came out with the same title so they changed some lyrics + the name. As a result, they also had to push back the release of it as a single to early next year instead of sooner.
That's why Nicki booted off Katy. Katy resumes her tour next year/has the superbowl and she won't be able to promote it at all. Ariana will be free, presumably.
And that is the hot lipton.

I don't blame Nicki. The single will be important to her.