Complex sentence: In that same period she designed and produced, along with Cecilia, the clothes for the new beachwear line called "Me Fui" for the summer of 2014; at that time Belén became the spokesperson for Samsung's mobile phones.
Split into simpler sentences: In that same period she designed and produced, along with Cecilia, the clothes for the new beachwear line called "Me Fui" for the summer of 2014. At that time Belén became the spokesperson for Samsung's mobile phones.