Lady Gaga's "Born This Way" debuts at No. 1.

Lady Gaga's little monsters were out in full force this week, pushing her new effort straight to the top of Canadian charts -- and with scary numbers.

The 25-year-old superstar's second studio album "Born This Way" shot to No. 1, selling a whopping 81,000 copies in its first week, according to Neilsen SoundScan data.

The figures make "Born This Way" the best debut of 2011, and it clocked the best first week numbers since Taylor Swift's "Speak Now," which started on top with 62,000 back in November of last year.

It easily surpassed sales of her first album "The Fame," which landed at No. 8 back in August 2008 with 6,900.-->

Even more sensational was Gaga's debut stateside, where she sold 1,108,000, making it the largest sales week there since 50 Cent's "The Massacre" rung up 1,141,000 in March of 2005. It was aided by a flurry of heavy promotion leading up to the release, including appearances on "Saturday Night Live," "The Oprah Winfrey Show," "American Idol," "The Late Show with David Letterman," as well as a 99 cent sale at Amazon.com.

She also becomes only the fifth woman to surpass the million mark in the U.S., according to Billboard.com.

The all-time record in the SoundScan era is still held by NSYNC's "No Strings Attached," which premiered at No. 1 with sales of 2,416,000 in 2000 - a feat that in all probability will never be reached again.

Back here in Canada, Adele's "21" (21,000) was relegated to the No. 2 slot after five consecutive weeks at No. 1, while lost in the mix of Gaga's big showing were the six other new debuts in the top 10, led by Brad Paisley's "This is Country Music" (9,300) at No. 3.

Other debuts included "Glee, the Music: Season Two, Volume 6" at No. 4, The New Kids on the Block/Backstreet Boys compilation "NKOTBSB" at No. 6, Foster the People's "Torches" at No. 7, Ian Kelly's "Diamonds & Plastic" at No. 8, and Daniel Desnoyers' "Summer Session 2011" at No. 10.

Elsewhere, Jenniefer Lopez's "Love?" sank from No. 2 to No. 5, and Rihanna's "Loud" moved down one to No. 9.

In the U.S. Brad Paisley placed second, followed by Adele in third, "Glee, the Music: Season Two, Volume 6" in fourth, and the collection "Maybach Music Group Presents Self Made Vol. 1" in fifth.