Complex sentence: Gaga's third studio album "Artpop" was released in November 2013 to mixed critical reception but with exceptional commercial performance, debuting atop the "Billboard" 200 chart and selling 2.5 million copies as of July 2014.
Split into simpler sentences: Gaga's third studio album "Artpop" was released in November 2013. Despite mixed reviews, it debuted atop the "Billboard" 200 chart, and sold 2.5 million copies as of July 2014.