Cher would do best out of those and in all honesty, it's not even too far-fetched to imagine a pop star in the White House these days.
1. Cher - respectable opinions, great life experience, politically aware, passionate
2. Madonna - too messy for the job (then again certainly not messier than the current president-elect)
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3. Beyoncé - not articulate enough, too shy
4. Gaga - too emotionally unstable (she'd crack under the pressure of being responsible for an entire country)
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5. J.Lo
6. Mariah
7. Britney - well...