Temps may be cooling off stateside, but it's really heating up down in Brazil -- partly due to Paul Walker and Jordana Brewster's hot beach bodies!

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The two, plus "Fast 5" co-stars Vin Diesel, Ludacris and Tyrese Gibson, were spotted in Rio de Janeiro to continue filming the fifth entry to the high-octane franchise.

Paul and Jordana were spotted shooting back in July in Puerto Rico, where Jordana's character was sporting a baby bump!

Brazil, Puerto Rico -- what a life!