Hollywood has booty on the brain ... with stars jacking up the junk in their trunks left and right.

Take a look at 10 babes' butts after we plumped their rumps ... and let us know if thick is the trick!

10. Kristin Cavallari

NOTE: Poll results are not scientific and reflect the opinions of only those users who chose to participate. Poll results are not reflected in real time.

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