Busquen la Corona (or Find the Crown in English) is the opening tune from the episode Dora Saves the Mermaids.
Clam: ♪♪Deep inside the ocean wide, there was a mermaid kingdom, where everyone was happy as can be.♪♪
Mariana: Our kingdom‘s the best!
Clam: ♪♪But then a mean old octopus dumped garbage on their heads.♪♪
Mariana: ♪♪Hey, why are you dumping all that trash on me?♪♪
Garbage Octopus: because I love it!
Clam: ♪♪And Mariana found the magic crown and put it on, she made a wish and suddenly, the garbage was all gone!♪♪
Garbage Octopus: Hey! what happened?
Clam: ♪♪once again, the kingdom sparkled up into the day, the waves blew up and swept the crown away!♪♪
Mermaids: Come on, we need your help! 'cause now the octopus is back!
Mariana: ♪♪You got find the crown!♪♪
Clam: ♪♪Busquen la Corona. find the crown that makes that garbage go away! the trash is pilling up so high, the mermaids and the mermen cried.♪♪
Clam and Mermaids: ♪♪Busquen, Busquen la Corona! let's find that crown now! x2♪♪
Clam and Mermaids: ♪♪Find the crown! find the crown now! Busquen la Corona!♪♪
Garbage Octopus: No way!
Mermaids: ♪♪Save our town!♪♪