I see gaga and britney collaborating next year mostly, whether it's gaga featuring her or vice versa. They've both expressed interest in working with each other.
And if justin finally decides to return to the music business i feel like (hope) there'll be a collaboration with britney since they're basically the biggest stars that flop label has left, that'd shock everyone.
If ANY of those happened....I would.......I would................... I WOULD......
Topic 4: Xtina's album will do better than Bionic
Topic 5: Brooklyn Carter, Dereonce
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Topic 6:
Ciara feat. Keri Hilson
Beyonce feat (Adele or Prince)
Katy (feat. Wiz Khalifa)
Katy (feat. Rihanna)
Someone Lucky (Feat. Beyonce)
EDIT: I'd like to add Rihanna and Madonna