There is a rumour that they have dueted with Britney, since Nicole said they would be most likely recording a track together while on tour. Other speculation surrounds a record with Lady Gaga, with whom they toured in the UK. I expect the Dolls' label is hoping for a surge in sales after the success of Jai Ho because it is widely publisized that Doll Domination has failed toperform sales-wise.
This era is messy! What happened to Bottle Pop? They have already had five singles and the album isn't even six months old!