Britney Spears and Brad Pitt.. hmm, Brad's too old now. I'd love her to go for Jesse McCartney, because the kids would be perfect.
I wouldn't put Ashton with Beyoncé either. He's a bit grungey, and she's very glamorous. I'd stick him with Faith Hill and her with ... well I can't think who, but she's a tad racist so he's have to be black. Maybe Obama haha