American singer Josh Groban has released ten studio albums, four live albums, and 34 singles. Throughout his career, he has sold over 35 million records worldwide, making him one of the biggest stars in the history of classical crossover. Groban ranks as Billboard's 14th top-selling artist of the 2000s with more than 20 million units sold in the U.S. alone. According to RIAA, he has sold 20.5 million certified album units in the US while "Noel" is his biggest seller being certified 6× Platinum in the country and was also the best-selling album of 2007 with almost 3.7 million sold that year. He has scored 3 No. 1 albums on Billboard 200. Closer was the best-selling classical album of the 2000s decade. Groban is also the only artist who has had two albums appear on the Top 20 Best-Selling Albums list of the past decade, according to Billboard.