Complex sentence: Mars filmed the music video for "Treasure" with Taja Riley, a model and dancer, in Las Vegas on May 20,2013, the day after the live performance of the song at the 2013 Billboard Music Awards.
Split into simpler sentences: Mars filmed the music video for "Treasure" with model/dancer Taja Riley in Las Vegas, on May 20,2013. The day after the live performance of the song at the 2013 Billboard Music Awards.