Pearl Jam checks in at No. 2. (WENN.COM file photo)

Pearl Jam made an impressive debut on the Canadian album charts, but they couldn't get a leg up on Bruno Mars.

The Seattle veterans jumped in at No. 2 with their 20th anniversary effort "Live On Ten Legs," which rung up sales of 4,200 copies, according to Neilsen SoundScan numbers.

However, it wasn't enough to speed past 25-year-old Hawaiian singer Mars, whose full-length debut "Doo-Wops & Hooligans" (6,100) hit No. 1 for the first time after four months on the charts.

Last week's top dog, Rihanna's "Loud" (3,600) slipped to No. 3, while Portland’s the Decemberists had the second best premiere of the week with their sixth album, "The King is Dead," at No. 4.

The Black Eyed Peas' "The Beginning" began to slip, dropping two levels to No. 5, The Script's "Science & Faith" checked in at No. 6, and DeadMau5's "4X4=12" shot up seven notches to No. 7.

The rest of the top ten comprised of Mumford & Sons' "Sigh No More" at No. 8, Pink's "Greatest Hits So Far" at No. 9, and the "MuchDance 2011" collection at No. 10.

In the U.S., the Decemberists came in first, followed by "Kidz Bop 19" in second, the Script in third, Social Distortion's "Hard Times & Nursery Rhymes" in fourth, and Gregg Allman's "Low Country Blues" in fifth.