Britney Spears' Femme Fatale Debuts At #1 On Billboard

Wiz Khalifa's Rolling Papers comes in at #2.

Make it an even half dozen. With the chart-topping bow next week of Femme Fatale, Britney Spears will notch her sixth Billboard 200 #1 debut thanks to first-week sales of 276,000 for the pop diva's seventh studio collection.

Though it's nearly half the 505,000 in sales the singer put up with 2008's Circus, the debut easily outpaces the week's #2 showing by Wiz Khalifa, whose Rolling Papers moved 197,000, according to figures provided by Nielsen SoundScan.

Among the other debuts in the top 10 are the physical release of Radiohead's latest, King of Limbs (#6, 69,000), Snoop Dogg's Doggumentary (#8, 50,000) and Mary Mary's Something Big, which rounds out the new titles at #10 on sales of 42,000.

The rest of the top 10: Adele, 21 (#3, 94,000), Chris Brown, F.A.M.E. (#4, 91,000, down 66 percent), Songs for Japan (#5, 71,000), Jennifer Hudson, I Remember Me (#7, down 66 percent) and Kirk Franklin, Hello Fear (#9, 46,000).

After debuting at #4 last week, the Strokes take a bit of a dive down to #18, as sales of Angles leveled off by 76 percent to 21,000. The hard-charging soundtrack to the critically panned fantasy film "Sucker Punch" actually rises nine spots in its second week to #22 on sales of 20,000.

The soundtrack to the "Grey's Anatomy: The Musical Event" episode comes in at #24 (19,000), while Sum 41's Screaming Bloody Murder inches on to the charts at #31 (15,000) and Panic! at the Disco plunge 25 places in week two to #32 with Vices & Virtues (15,000).

A number of indie darlings also make their chart debuts, including the Mountain Goats with All Eternals Deck (#71, 9,000), the Pains of Being Pure at Heart, Belong (#91, 6,000) and Peter Bjorn and John, Gimme Some (#108, 6,000).

Britney also tops the iTunes albums chart, edging out the Songs for Japan compilation, followed by Khalifa, Adele, the "Grey's Anatomy"

album, Mumford & Sons' Sigh No More and albums by Brown, Radiohead, the self-titled effort from Sara Ramirez and the "Sucker Punch" soundtrack.

Black Eyed Peas rule the iTunes singles chart with "Just Can't Get Enough," winning out over Katy Perry's "E.T.," Rihanna's "S&M," Perry's "E.T." without Kanye West, then Khalifa's "No Sleep," Brown's "Look at Me Now," Jennifer Lopez's "On the Floor," Adele's "Rolling in the Deep," Cee Lo Green's "Forget You" and Lady Gaga's "Born This Way."

Next week will see new albums from Foo Fighters, TV on the Radio, Paul Simon and Jessie J.