"Vai Passar" is Buarque's MPB hit...from 1984-85.
"Vai" was extremely popular when I lived in Rio.
It was the nation's transition year...from military control into a democracy.
It also reminds me of my novia then...the fabulous Rita from Niteroi, a quiet enclave across the bay from Rio.
Rita was also a Dutch Brasilera. A knock-out blond...who spoke no English...and put up with my street Portuguese.
Oi, Niteroi!
FOR more bio info, SEE:
http://en.wikipedia.org/wiki/Chico_Buarque