“Lucky Old Sun” (BNA) has become Kenny Chesney’s fifth chart-topper, selling 176,000 copies in the U.S., according to Nielsen SoundScan.

While easily dethroning the champ of the past two weeks, T.I.’s “Paper Trail,” by 44,000 units, disc racked up the lowest opening sales tally among Chesney’s No. 1 albums.

Ray LaMontagne’s third album, “Gossip in the Grain” (RCA), set first-week sales and chart position records for the singer-songwriter. It sold 60,000 copies and opened at No. 3. His previous high came with “Till the Sun Turns Black,” which hit No. 28.

Keane’s “Perfect Symmetry” (Interscope) moved 43,000 units to come in at No. 7.

Lucinda Williams’ “Little Honey” (Lost Highway) is her first top 10 album, opening at No. 9 on sales of 35,000.

Billy Currington’s third album “Little Bit of Everything” (Mercury) sold 25,000 to open at No. 13.

Other debuts included Ingrid Michaelson’s “Be OK” (Cabin 24 Records), which sold 15,000 (No. 35); Yo-Yo Ma’s “Yo-Yo Ma & Friends: Songs of Joy & Peace” (Sony Classical), 12,000 (No. 41); Unearth’s “March” (Metal Blade), 11,000 (No. 45); and Copeland’s “You Are My Sunshine” (Tooth & Nail), 10,000 (No. 48).

In just one day of sales after Republican vice presidential candidate Sarah Palin and Adele appeared on “Saturday Night Live,” the Brit songstress’s “19” nearly tripled in sales. The album, released in the U.S. on Columbia, sold 11,000 copies a week after it had done a mere 4,000. It skyrocketed to No. 46 from No. 129.