In a rear-view photo, Rivera shows off her perfect bum in a thong look. In a third snapshot, Rivera can't help but check out her own bodacious backside in the reflection of a window. "Look back at it..." she captioned the funny photo.

It's easy to see why the actress is enamored with her own fine physique! 

As for her relaxing getaway, an eyewitness tells E! News Rivera spent lots of time tanning by the pool with friends at her hotel.

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