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Rumer later showcased substantial cleavage with a Lili Claspe body chain beneath a black gown for a night out with the 58-year-old Emmy nominee.
She captioned a poolside back view of her spaghetti-strapped dress: 'Going dancing!'
Spinning around: The celebrity offspring donned an array of swimwear during her lavish trip, which she hinted was bankrolled by her famous mother Demi Moore
Rumer - who boasts 1.1M Instagram/Twitter followers - captioned one snap: 'Mom's Red Bull always trying to steal my thunder'
'Paradise': Willis also posted a video montage of enviable moments, like diving off the vessel, from her holiday