They released the Spanish album "Somos Los Hijos del Rock (We Are The Sons Of Rock)", followed by an English-Tagalog album for the Philippines titled "In Action" with Ralphy and Rubén. In late 1987, Ralphy's parents pulled him from the group, citing improper treatment by management; this eventually came to light in 1991 with accusations of a Menudo sex scandal. Charlie was again asked to fill in during the Philippines tour, which would be their last as their popularity there waned. In early 1988, Angelo García 12 replaced Ralphy Rodríguez14 and they released their final English-language album, "Sons of Rock", scoring an international hit, "You Got Potential". Another song, "TLC", featured lead vocals by Ricky Martin. In August 1988, Raymond Acevedo's contract was about to expire, but he decided to leave before auditions were held for his replacement, and Menudo performed as a quartet for a few months before Robert Avellanet 13 took over. The album Sombras Y Figuras Shadows And Figures was released at the end of the year. After 5 years with Menudo, Ricky Martin 17 left in July 1989 and was replaced by Rawy Torres 14. Martin's last concert with Menudo was in the Centro de Bellas Artes de Santurce in San Juan. The album "Los Últimos Héroes (The Last Heroes)" soon reestablished Menudo's popularity in Latin America, especially in Venezuela, where a 5-part miniseries was shot to promote the album. Despite their newfound success, the group kept facing problems: Angelo García 14 left the group, breaking his contract; he was replaced by César Abreu 13, who only lasted 7 months. Before Abreu left, management was preparing for Sergio's departure and the debut of the first non-Puerto Rican member, Adrián Olivares 13 of Mexico, but Abreu's exit delayed Sergio's departure. Management decided to keep Sergio for another Spanish album, "No Me Corten El Pelo"(Don't Cut My Hair) featuring the Sergio/Rubén/Robert/Rawy/Adrián lineup. In 1990, two new non-Puerto Rican members joined the group: Edward Aguilera,12, of Venezuela replaced Sergio Blass, 17, and Jonathan Montenegro 15 of Spain replaced Rubén Gómez 16. Both members left a few months later.