Becky already uncursed Kesha tho.
She cursed her when she collaborated with her on the Die Young remix, then Warrior, C'Mon and Crazy Kids flopped, then in like June 2013 or something she said in an interview that she wanted to work with Kesha again and thought she was really cool and she was able to make the Dirty Love video and actually release it and Timber smashed. So we're safe.

I don't think you can get the curse twice.