Complex sentence: The pair's career progressed to providing creative direction for tours and live events, where they worked with Christina Aguilera, Ricky Martin, Celine Dion, Kayne West, and Jennifer Lopez.
Split into simpler sentences: The pair's career progressed to providing creative direction for tours and live events. This career move enabled them to work with Christina Aguilera, Ricky Martin, Celine Dion, Kayne West, and Jennifer Lopez.