Taylor Swift's '1989' Spends a Ninth Week at No. 1 on Billboard 200 Chart

There's no stopping Taylor Swift, as the superstar notches a ninth week at No. 1 on the Billboard 200 chart with her 1989 album.

1989 sold 155,000 equivalent units in the week ending Jan. 11, according to Nielsen Music (down 36 percent). The Billboard 200 chart measures multi-metric album consumption, which includes traditional album sales, track equivalent albums (TEA) and streaming equivalent albums (SEA).

Swift also easily leads the Top Album Sales chart, which ranks the best selling albums of the week based on pure album sales. 1989 sold 111,000 copies last week (down 35 percent). The set has now sold 3.94 million, and is on the verge of becoming Swift's fifth album to sell 4 million copies. (Each of her studio efforts have exceeded four million in U.S. sales.)

Back on the new Billboard 200 chart, Ed Sheeran's x continues to climb, rising one position to No. 2 with 76,000 units (down 9 percent). Regular album sales comprise 34,000 of that figure (down 13 percent). This is the highest Billboard 200 rank for the set since its second week on the chart, when it fell 1-2 on the list dated July 19, 2014.

Nick Minaj's The Pinkprint slips 2-3 with 60,000 units (down 29 percent), selling 34,000 copies (down 34 percent). Sam Smith's In the Lonely Hour is steady at No. 4 with 57,000 units (down 31 percent). His album shifted 30,000 in sales for the week (down 38 percent).

The lone debut in the top 10 -- and the only bow in the top 30 -- starts at No. 5, as hip-hop duo Rae Sremmurd enters with its first set, SremmLife. The album shifted 49,000 units in its first week, powered by 34,000 in traditional album sales.

Hozier's self-titled album is a non-mover at No. 6 with 49,000 units (down 19 percent). Of its 49,000 units for the week, regular album sales total just 20,000 units (down 20 percent).

J. Cole's 2014 Forest Hills Drive is also steady at No. 7, selling 45,000 units (down 24 percent). 34,000 of that figure are album sales (down 29 percent).

The Guardians of the Galaxy soundtrack falls 5-8 with 35,000 (down 50 percent), comprised entirely of traditional album sales.

Rounding out the top 10 are two stationary albums: One Direction's Four (No. 9; 32,000 units ­-- down 41 percent) and Ariana Grande's My Everything (No. 10; 28,000 ­-- down 34 percent). In terms of pure album sales, the titles sold a respective 17,000 (down 47 percent) and 7,000 (down 38 percent).