Kate Upton's Boobs Nearly FALL OUT While Impersonating Britney Spears on Lip Sync Battle

When you're as top-heavy as Kate Upton, you're only a sneeze away from public humiliation. Luckily for Kate, her top held on for dear life and got the job done during this sultry rendition of Britney Spears' 'Baby One More Time' on Lip Sync Battle.

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