Complex sentence: In December 2013, "Super Bass" was certified 8 × platinum by the Recording Industry Association of America (RIAA), and as of December 2014, the song has sold 5 million copies in the United States.
Split into simpler sentences: In December 2013, "Super Bass" was certified 8 × platinum by the Recording Industry Association of America (RIAA). As of December 2014, the song has sold 5 million copies in the United States.