Realistically the album has peaked AJ, Its never gonna get back in the top 15 in sales now. Hopefully it'll bring some spring back to sales but not enough for it to pass what it has already reached. Hence peaking.
A good bit of promo for Tell Me Why will help alot and hopefully get it back in the top 40 just for a while.
Atleast Party Starter is doing well on TV here in the UK, im hoping for another top 10 here, maybe not quite with Switch's success though, Who knows.