As we reported on Thursday (Dec. 8), Michael Buble's "Christmas" album is on its way to a third straight week at No. 1 on the Billboard 200 chart, so say industry prognosticators. The album may sell well over 400,000 copies by the end of the tracking week on Sunday, Dec. 11.

"Christmas" looks to earn the most weeks at No. 1 of any Michael Buble album, as it will eclipse the two-week chart-topping run of "Crazy Love" in 2009. "Christmas" will also mark the longest consecutive-week reign at the top for any album since early June, when Adele's "21" wrapped a five-week run at No. 1 (of its 13 total weeks at No. 1).

On Nielsen SoundScan's Building chart below -- a precursor to the final Billboard 200 ranking -- reflecting the first four days (Monday through Thursday) of SoundScan's tracking week as reported by six major merchants. Buble is unsurprisingly at No. 1 on the tally, while the Black Keys' new "El Camino" is sitting pretty at No. 2.

The latter should start with at least 150,000 sold, but will likely move even more -- perhaps 170,000 to 180,000. Even if it sells only 150,000, that will easily notch the rock act's best sales week yet. Their last album, "Brothers," set their previous best week, when it landed at No. 3 with 73,000 in May of 2010.

Adele's "21" -- recently crowned the No. 1 Billboard 200 album of the year -- is in the No. 3 spot, followed by Justin Bieber's former No. 1, "Under the Mistletoe," at No. 4.

Amy Winehouse's posthumous album "Lioness: Hidden Treasures," is No. 5 on the Building Chart, Drake's "Take Care" is No. 6 and "Glee, the Music: Season Three Volume 7" album is No. 7.

Winehouse's effort might start with 90,000 to 110,000, while the latest "Glee" set is looking to bow in the 50,000 to 60,000 range.

Korn's new "Path of Totality" is No. 8 on the Building tally, while Nickelback's "Here and Now" takes the No. 9 slot. Closing out the preview chart is Andrea Bocelli's "Concerto" set at No. 10. Korn's new effort may launch with a 50,000 start.