Kenny Chesney is back at the top of the U.S. album charts with new release Life On A Rock thanks to first-week sales of 153,000. It's the superstar's seventh chart-topper on the Billboard 200 - one behind Garth Brooks, who is the only country artist to land eight number ones on the countdown. Chesney's new album is one of only two debuts in the new top 10 - fellow country act Randy Rogers Band enter the chart at nine with Trouble. Meanwhile, Michael Buble's To Be Loved slides a spot to number two in its second week on release, and Justin Timberlake's The 20/20 Experience holds at three. The pop star's latest album has spent every week in the top three since it was released seven weeks ago.