Still basking in the afterglow of her six-Grammy triumph, Adele maintained her hold on No. 1 on the U.S. album chart for a 22nd non-consecutive week.

The English singer shifted another 297,000 copies of “21” (Columbia) last week, according to Nielsen SoundScan data for the week ending Feb. 26. Set marked a drop of 59% from Adele’s record post-Grammys take of 730,000 units last week.

The vocalist’s debut “19” dropped three positions to No. 7, moving 39,000 (off 56%). “21” has now sold 7.6 million, while “19” has moved almost 2 million.

The late Whitney Houston’s “Greatest Hits” (Arista/Sony) maintained its post at No. 2, selling 174,000 copies (down just 1%).

Houston’s sales renaissance continued in the wake of her death on Feb. 11, as two of her catalog titles entered the top 10.

The soundtrack for her 1992 film vehicle “The Bodyguard” – containing her mega-hit version of “I Will Always Love You” — gained 176% and climbed 32 slots to No. 6, selling 47,000, while her 1985 debut “Whitney Houston” moved up 28 poles to No. 9, moving 30,000 (up 72%).

Three new releases make comparatively quiet debuts in the top 10 this week.

“Some Nights” (Fueled By Ramen), by New York pop band fun., arrived at No. 3 with 69,000 shifted. It’s the act’s sophomore studio release; its 2009 debut “Aim and Ignite” peaked at No. 71.

Rapper Tyga’s “Careless World: Rise of the Last King” (Cash Money) bowed at No. 4 behind a 61,000-unit stanza. Member of Lil Wayne’s Young Money posse sees a huge bounce with his sophomore set: His 2008 debut “No Introduction” topped out at No. 112.

Philly hip-hop duo Chiddy Bang moved in at No. 8 with “Breakfast” (Virgin), which tallied 31,000. Group is riding its current hit “Ray Charles.”

Top 10 is filled out by two compilations: “Now 41” (No. 5, 47,000 sold, down 43%) and “2012 Grammy Nominees” (No. 10, 29,000, off 66%).

A new title by Celtic Thunder is the best bet for a top 10 debut on next week’s chart.