Complex sentence: She also participated in several Mexican soap operas (telenovelas) and was the star in some movies (sometimes alongside Pedro Fernandez); but it wasn't until she began to record albums fully dedicated to children songs that she achieved international recognition.
Split into simpler sentences: She also participated in several Mexican soap operas (telenovelas) and was the star in some movies (sometimes alongside Pedro Fernandez). However, despite her early successes, it wasn't until she began to record albums fully dedicated to children songs that she achieved international recognition.