Dev would be really great, but only 30% chance, since she's still pregnant and after that, she'll spent at least 1 year rasing her child. Kerli or/and Sky Ferreira would be really good too, both will get the promo they need. Wynter Gordon and Pixie Lott would be really good too., both getting amazing promo in the US. Maybe GaGa could return the favor and Nicole Scherzinger be an opening act, like GaGa was for PCD. It could be anybody, but these are the people I hope that could get it.
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