Ayer y hoy, titled A Festa Vai Começar in the Brazilian version, is the nineteenth studio album (the second in Portuguese) by the Puerto Rican boy band Menudo, released in 1985 by RCA Records.

[1][2] The album features members Ricky Martin, Robby Rosa, Charlie Massó, Roy Rosselló, and Raymond Acevedo.

[8][9] In an interview about the album, Villa said: "The most amazing thing is that in these compositions the boys manage to give a magical touch, unique to youth.

"[9] One of the songs on the album, titled "Marcelo," was recorded as a tribute to a homeless boy from Brazil, whom the artists met during their tour in the country.

[13] The Spanish version of the album reached number nineteen on the Billboard Latin Pop Albums chart,[14] while A Festa Vai Começar reached number five on the Brazilian chart surveyed by Nelson Oliveira Pesquisa e Estudo de Mercado (Nopem).