Justin Timberlake’s The 20/20 Experience easily spends a second week at No. 1 on the Billboard 200, selling 318,000 copies, according to Nielsen SoundScan. It’s more than 100,000 ahead of the No. 2 album, the debuting I Am Not a Human Being II from Lil Wayne (217,000).

Timberlake’s set is down by a moderate 67% in its second week. The last set to sell more than a half-million in its first week was One Direction’s Take Me Home last November. It fell by 67% as well in its second week, moving from 540,000 to 176,000.

Before that, the last album to notch a half-million-plus start arrived a few weeks earlier, when Taylor Swift’s Red launched with 1.2 million. It slipped by 72% in its second week.

After two weeks on sale, The 20/20 Experience has sold 1.3 million, becoming the only album to sell 1 million copies this year. A week ago, 20/20 instantly became the year’s biggest-selling album after selling 968,000 in its first week.

Mumford & Sons’ Babel is 2013’s second-biggest selling album, with 693,000 sold.

As previously mentioned, Lil Wayne’s I Am Not a Human Being II starts in the runner-up slot with 217,000. It’s one of six top 10 debuts this week. Wayne’s last Human album, released in 2010, debuted at No. 2 with 110,000 as a digital exclusive. Two weeks later, after the CD was released, it jumped to No. 1 with 125,000.

Blake Shelton logs his best sales week ever, as Based on a True Story bows at No. 3 with 199,000. His previous biggest week came when his last studio set, 2011’s Red River Blue, bowed at No. 1 with 116,000. Over on the Top Country Albums chart, Based on a True Story starts at No. 1, giving Shelton his second No. 1 after Red River Blue.

OneRepublic is also having a good week, as its Native album starts at No. 4—the group’s first top 10 album. The set sold 60,000, which is the band’s best sales frame since 2007, when its debut album, Dreaming Out Loud, moved 75,000 in its first week. Its second set, 2009’s Waking Up, debuted and peaked at No. 21 with a 39,000 launch.

Alan Jackson bows at No. 5 with Precious Memories: Volume II (55,000), the sequel to his 2006 smash Christian collection. The original set debuted and peaked at No. 4 with 107,000, and was that year’s biggest-selling Christian/gospel album.

At No. 6 this week is veteran rock band Depeche Mode with its new Delta Machine album. The set—its first for Columbia Records—moves 52,000 and grants the trio its seventh top 10 effort. All seven of the band’s studio releases from Violator through Delta Machine have reached the top 10.

Rounding out the top 10 debuts this week is the Strokes’ Comedown Machine, slipping in at No. 10 with 41,000. It’s the act’s smallest debut week since 2001 and follows three sets that all debuted and peaked at No. 4 between 2003 and 2011. Their last release, Angles, bowed with 89,000.

As for the holdovers in the top 10: P!nk’s The Truth About Love is pushed back 5-7 despite a gain (49,000; up 34%), as is Imagine Dragons’ Night Visions (6-8 with 47,000 sold, up 59%). Bruno Mars’ Unorthodox Jukebox is shoved way down (falling 3-9) even though it earned a solid gain (47,000; up 13%).

All three titles—like many on the chart this week—profit from Easter holiday gift purchases and sale promotions. All but two albums in the top 30 post gains: Only Timberlake’s 20/20 and Luke Bryan’s Spring Break . . . Here to Party (4-12; down 3%) experience declines.

Over on the Digital Songs chart, P!nk’s “Just Give Me a Reason” (featuring Nate Ruess) holds at No. 1, selling 286,000 (up 18%). No. 2 is also a non-mover, as Macklemore & Ryan Lewis’ “Thrift Shop” (featuring Wanz) sells 282,000 (up 21%).

Imagine Dragons’ “Radioactive” flies 8-3 with 236,000 (up 117%), Mars’ “When I Was Your Man” is steady at No. 4 with 235,000 (up 9%), and Rihanna’s “Stay” (featuring Mikky Ekko) slips 3-5 with 229,000 (though it gains by 3%).

Ariana Grande’s “The Way” (featuring Mac Miller) is the week’s highest debut, as it enters at No. 6 with 219,000. It’s the first entry on this chart for the Nickelodeon TV star, and serves as the lead single from her debut album, due later this year.

Timberlake’s “Suit & Tie” (featuring Jay-Z) rises 10-7 with 183,000 (up 81%), and Pitbull’s “Feel This Moment” (featuring Christina Aguilera) slides 5-8 with 152,000 (up 10%).

Macklemore & Ryan Lewis notch a second top 10 this week as “Can’t Hold Us” rises 16-9 with 136,000 (up 77%). It’s the second radio single from the duo’s album The Heist, following “Thrift Shop.”

Closing out the top 10 is Demi Lovato’s “Heart Attack,” rising 11-10 with 123,000 (up 30%).

Overall album sales in this past chart week (ending March 31) totaled 6.5 million units, up 7% compared with the sum last week (6.1 million) and up 6% compared with the comparable sales week of 2012 (6.2 million). Year-to-date album sales stand at 74 million, down 5% compared with the same total at this point last year (77.8 million).

Digital track sales this past week totaled 28.3 million downloads, up 14% compared with last week (24.8 million) and up 6% stacked next to the comparable week of 2012 (26.7 million). Year-to-date track sales are at 356.8 million, down 1% compared with the same total at this point last year (361.3 million).

Next week’s Billboard 200 competes with the same week in 2012 when: Nicki Minaj’s Pink Friday: Roman Reloaded debuted at No. 1 with 253,000, giving the rapper her second chart-topper. [Billboard.biz]