Surely someone is going to come along to knock Adele off her perch. But in the meantime, the Grammy-winning singer simply cannot be beat, as her 21 will notch its 22nd non-consecutive week at #1 next week thanks to sales of nearly 297,000, according to figures provided by Nielsen SoundScan.

And that's with sales dropping almost 60 percent from her post-Grammy high. More than a year into her incredible run, Adele has sold almost 7.7 million copies of her second album in the U.S. Also holding strong was the Whitney Houston greatest-hits collection, which lost just 1 percent of its sales from the previous week, staying in the #2 position on sales of 174,000 in the second full chart week since the singer's death. It was joined in the top 10 by the soundtrack to "The Bodyguard," (#6, 47,000, up 176 percent) and her self-titled debut (#9, 30,000, up 72 percent).

Among the debuts in the top 10 are: Fun., Some Nights (#3, 70,000); Tyga, Careless World: Rise of the Last King (#4, 61,000); and Chiddy Bang, Breakfast (#8, 31,000).

The rest of the top 10: Now That's What I Call Music! 41 (#5, 54,000); Adele's debut, 19 (#7, 39,000); and the 2012 Grammy Nominees compilation (#10, 29,000).

Just outside the top tier, buzz duo Sleigh Bells rolled into a #12 debut with their second album, Reign of Terror and Grimes hit #98 with Visions (5,000).

Over on the iTunes singles chart, Fun.'s hookup with Janelle Monae, "We Are Young," was at #1, followed by Kelly Clarkson's "Stronger (What Doesn't Kill You)," The Wanted with "Glad You Came," Katy Perry's "Part of Me" and B.o.B's "So Good." The list was rounded out by Adele at #6 with "Set Fire to the Rain," Nicki Minaj just behind with "Starships," then Gotye with "Somebody That I Used to Know," Chris Brown with "Turn Up the Music" and Carrie Underwood's "Good Girl."

Adele easily kept the #1 spot on the iTunes album chart, followed by Tyga, Fun., Chiddy Bang, Houston, Sleigh Bells, Gotye's Making Mirrors, Adele's 19, Drake's Take Care and the Beatles' 1.

Adele should be safe for another week as she pursues the magic 24-weeks-at-#1 mark, though the new album from Bruce Springsteen could provide a challenge. Otherwise, the fresh faces include Sean Paul, Estelle and Kid Cudi's troubled WZRD project.