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One is the magic number for Justin Timberlake this year.

Splitting up his albumThe 20/20 Experienceinto two parts has proven to be a genius career move.The 20/20 Experience - 2 of 2debuted at No. 1 on theBillboard album chartwith 350,000 sold in its first week, according to Nielsen SoundScan. He's the only artist this year who has sold more than 300,000 copies in a week for two different albums. That makes him the best-selling artist of the year with 2.7 million copies of20/20sold in the U.S. Timberlake's20/20knocks Drake'sNothing Was the Sameto No. 2, which sold 148,000 copies.

With 129,000 sales in its first week, Lorde'sPure Heroinedebut rules the No. 3 spot.Luke Bryan'sCrash My Partymoves up two spots from No. 6 to No. 4 (32,000). Country singer Tyler Farr's debut album,Redneck Crazy, rounds out the top five with 29,000 its first week. Three-sister band Haim pulled in 26,000 (85% of those were downloads) with debut albumDays Are Gone, which ranked No. 6.