Liziane Gutierrez has World Cup fever ... not that she needs an excuse to rock a bikini.
The Brazilian model celebrated the Samba Kings' 2-0 win over Mexico with a trip to Barra Da Tijuca ... a beach neighborhood near Rio de Janeiro. We're told Liziane was there with a friend ... doing what girlfriends do when they turn up together -- lather each other's asses with sunscreen and say thanks ... with a kiss.
Brazil's on to the quarterfinals and, even if you're not rooting for them ... we all win, now.