2. Spencer came dressed as a space alien, while Heidi wore a cute lacy gold dress.
4. Spencer dances with what can only be described as a Heidi blow-up doll.
Heidi and Spencer Do a Vegas Halloween Bash
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 Heidi and Spencer Pratt hosted the Halloween Party at Pure Nightclub in Caesars Palace Las Vegas on Saturday night. Photo: Getty Images
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Heidi and Spencer Do a Vegas Halloween Bash
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 Spencer came dressed as a space alien, while Heidi wore a cute lacy gold dress. Photo: Getty Images
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Heidi and Spencer Do a Vegas Halloween Bash
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 Heidi told the Las Vegas Review-Journal that she and Spencer are happy to be back together. Photo: Getty Images
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Heidi and Spencer Do a Vegas Halloween Bash
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 Spencer dances with what can only be described as a Heidi blow-up doll. Photo: Getty Images
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