Complex sentence: In some cities (including Buenos Aires and Santiago de Chile), Arjona performed "Acompáñame A Estar Solo" before "El Amor"; in Monterrey, "El Amor" was performed first.
Split into simpler sentences: In some cities, like Buenos Aires and Santiago de Chile, Arjona performed "Acompáñame A Estar Solo" before playing "El Amor". In Monterrey, "El Amor" was performed first.