Image Credit: Pamela LittkeyThis planet still revolves around Justin Bieber. For the second straight week (and third nonconsecutive) his My World 2.0 is No. 1 on the  Billboard 200 albums chart, selling 92,000 records.

It was a slow week on the chart: Bieber’s World is the lowest-selling album in the top spot in almost a year. The last to hold that dubious distinction was Chrisette Michele’s Epiphany, last May.

Psychedelic rockers MGMT‘s sophomore album, Congratulations, is the chart’s biggest debut, landing at No. 2 with 66,000 sold. It’s the best chart showing of their career, Billboard noted. Oracular Spectacular, their last album, never sold more than 17,000 in a week, but its steady sales have led it to a 606,000 total in the U.S.

The chart’s second-highest debut is Coheed and Cambria’s No. 5. ranking for their Year of the Black Rainbows, which sold 51,000 copies. It’s a step down from their last album, 2007′s No World For Tomorrow, which bowed at No. 6 but sold 62,000 units.

Usher, last week‘s No. 2, is now down to No. 4. His latest effort, Raymond v. Raymond, sold 64,000.

Riding off her performance on NBC’s Saturday Night Live,  Ke$ha‘s Animal returns to the top 10, moving from No. 16 to No. 8 with 31,000 sold.

Monica‘s Still Standing is doing just that in the top 10, holding steady 30,000 records sold at the No. 9 spot.

And Justin Bieber’s first installment of My World falls two spots No. 10 with 30,000.

Surprised MGMT couldn’t knock Bieber out of No. 1? Did you buy anything new this week? Let us know.