A quick look at the most notable jumps and drops on this week's Billboard 200 albums and Hot 100 singles charts.

The Billboard 200

-- Sara Bareilles: The singer/songwriter scores her first No. 1 album this week as her sophomore set, "Kaleidoscope Heart," enters atop the Billboard 200 chart with 90,000 sold, according to Nielsen SoundScan. Outside the sleepy top 10 this week, there were notable movers and shakers making waves. Read on...

-- Robyn: As her "Body Talk, Pt. 2" EP arrives at No. 41 with 8,000, it easily bests the peak performance of "Body Talk, Pt. 1," which spent one lone week on the list at No. 97 in July, with 5,000 sold in its first week.

-- Sarah McLachlan: After she performed "Forgiveness" (from her newest album, "Laws of Illusion") on both "America's Got Talent" and "The Tonight Show With Jay Leno" last week, "Laws" makes the largest leap on the chart, climbing 79 slots to No. 75 with 5,000 (up 51%).

-- Florence + the Machine: At No. 44, the act's "Lungs" album vaults 56 positions (8,000; up 70%) with the second-largest positional jump on the tally, thanks to the act's buzzed-about performance of "Dogs Days Are Over" on last Sunday night's (Sept. 12) MTV Video Music Awards. Expect another increase next week once a full week's worth of impact is felt from the show. (SoundScan's tracking week ends at the close of business each Sunday.) Over on the Billboard Hot 100 singles chart, "Dog Days" debuts at No. 93 off the strength of its 27,000 downloads sold last week (up 276%).

-- Murderdolls: The horror-rock duo of Joey Jordison and Wednesday 13 watches its album "Women and Children Last" free fall down the tally from No. 43 to No. 179 in its second week (3,000; down 69%). Its 136 slot descent is the biggest drop on the chart this week -- a drop not entirely unexpected, considering many rock acts with devoted (but smallish) followings tend to see their albums slide hard in their second week out.

The Billboard Hot 100

-- Katy Perry: She holds at No. 1 on the Billboard Hot 100 for a second week with "Teenage Dream." While airplay for the track continues to grow (5-4 on Hot 100 Airplay, up 9%), downloads trail off by 11% to 197,000, according to Nielsen SoundScan, knocking the title 1-2 on Hot Digital Songs.

-- Bruno Mars: Replacing Perry atop Hot Digital Songs is Bruno Mars with his debut solo single "Just the Way You Are," which moves 209,000 downloads (up 19%) and is the week's top Digital Gainer. It's the first time Mars has been No. 1 on Digital Songs as a lead artist. He previously guested on B.o.B's chart-topper "Nothin' on You," which led for two weeks in May. "Just" improves 4-3 on the Hot 100 and is in prime contention for the top spot next week as it also nabs the Airplay Gainer tag with an increase of 16 million listener impressions (to 91.2 million), according to Nielsen BDS.

-- Rihanna: Also in contention for No. 1 next week on the Hot 100 is Rihanna's "Only Girl (In The World)," which debuts at No. 75. The track hit digital retailers on Sept. 13 and will assuredly move into the top five of the chart with first-week download sales expected to be near 200,000. A sum significantly north of that could push the track to the top. Rihanna's Hot 100 debut comes from strong out-of-the-box airplay, as it enters Hot 100 Airplay at No. 42 -- her best-ever start on that list -- with 30 million listener impressions.

-- Flo Rida: The rapper claims his fifth top 10 in less than three years and first since "Sugar" in May 2009, with "Club Can't Handle Me," featuring David Guetta (13-9). Flo Rida's track has moved 743,000 downloads thus far, not surprising for an artist who claims two of the top 10 selling-digital songs in history, according to Nielsen SoundScan. "Low" ranks at No. 3 with 5.68 million downloads, with "Right Round" at No. 10 with 4.64 million.

-- Selena Gomez & the Scene: The act, led by Disney Channel star Gomez, starts with 69,000 downloads with "A Year Without Rain," the title track from its latest set, due Sept. 21. The song is the third straight entry from the group to debut in the top 40 this year. While it's normally difficult for Disney-based acts to improve upon a high digital-fueled debut chart rank, Gomez & the Scene did better with a No. 39 debut for "Naturally" earlier this year to an eventual No. 29 peak thank to success at top 40 radio. The song reached No. 12 on the Mainstream Top 40 chart.

-- LFO: Sales of LFO's singles surged last week following news of the passing of the trio's Rich Cronin. The biggest seller was their 1999 No. 3 Billboard Hot 100 hit "Summer Girls" (up 502% to 4,000 downloads). The track was LFO's highest-charting Hot 100 single, and reached its peak on the list exactly 11 years ago this month.

-- Michael Buble: The crooner bows with "Hollywood" on the Billboard Hot 100 at No. 55 and Hot Digital Songs at No. 29 (46,000 downloads). The track ushers in the deluxe "Crazy Love Hollywood Edition," due Oct. 25. Buble, who has topped the Adult Contemporary chart three times, is coming off his biggest pop hit yet, reaching No. 24 on the Hot 100 and No. 21 on Mainstream Top 40.