Chart Shakers

Mariah Carey, Lady Antebellum and Keisha Cole lead the list of the Hot Shot Debuts, Pacesetters and Greatest Gainers on this week's Billboard charts.

Hot Shot Debuts: Mariah Carey makes for one heck of a hot shot this week as her album "E=MC2" earns Hot Shot Debut awards on three major charts: The Billboard 200, The Billboard Hot 100 and Top R&B/Hip-Hop Albums. On the big chart, Carey checks into the penthouse suite to claim her sixth No. 1 with sales of 463,000, according to Nielsen SoundScan, the best one-week tally of her career and also the best sales week of 2008 thus far. With this triumph, Carey ties Madonna and Janet Jackson for second-most No. 1 albums by a female artist. The three trail only Barbra Streisand, who has eight.

Carey also lands at the summit of Top R&B/Hip-Hop Albums. This is Carey's 15th charting effort on Top R&B/Hip-Hop Albums.

Carey's performance of "Bye Bye" on the April 16 edition of "American Idol" helps propel the track to a No. 23 debut on the Hot 100, as does a healthy serving of digital sales. The song moved 60,000 downloads this week, earning it the No. 11 spot on Hot Digital Songs.

Over on Top Country Albums, Hot Shot Debut honors belong to Lady Antebellum. The trio's self-titled disc enters on top with sales of 43,000, becoming the first debut album by a duo or group to bow on this chart at No. 1 in the Nielsen SoundScan era (since May 1991). The album also opens at No. 4 on The Billboard 200, fueled by single "Love Don't Live Here," which cracks the top 10 (11-9) on Hot Country Songsin its 29th week.

Greatest Gainers: On The Billboard 200, Miley Cyrus sews on Greatest Gainer stripes for "Hannah Montana/Miley Cyrus: The Best of Both Worlds Concert," which scoots 31-3 - a new peak - with a 162% sales increase to 47,000. The album became available April 15 to all retailers after five weeks as a Wal-Mart exclusive. Cyrus also scores her first Hot 100 top 10 (11-10) this week with "See You Again."

Over on Top Country Albums, it's Taylor Swift who takes home the Greatest Gainer award for her self-titled disc, even though it holds at No. 3 for a second week. The album also moves 13-10 on The Billboard 200, with a 13% sales increase to 29,000.

Keyshia Cole joins the Greatest Gainer winners circle as "Just Like You" climbs 8-5 on Top R&B/Hip-Hop Albums with a 16% sales bump to 3,400.

On the Hot 100, Leona Lewis captures the Greatest Gainer/Airplay trophy for "Bleeding Love" even as the single slides 1-2, flip-flopping with Lil Wayne's "Lollipop." The Greatest Gainer/Digital prize goes to John Mayer's "Say," which jumps 35-12 in its 16th week with help from "Dancing With The Stars," where the song was recently performed by the house band. "Say" also moves 25-8 on Hot Digital Songs, with downloads up 133% to 92,000.

Pacesetters:The soundtrack to "Juno" sets the pace on The Billboard 200 thanks to the film's April 14 DVD release. The album flies 46-8 with a 162% increase to 31,000. Now in its 16th week, the set peaked at No. 1 in its fourth week (Feb. 9 Billboard).

It's Willie Nelson who garners Pacesetter honors over on Top Country Albums, where four-disc career retrospective "One Hell of a Ride" moves 66-52 on the back of a 42% sales bump to 1,400 in its third week. The album debuted at No. 46 on the April 19 chart.

And on Top R&B/Hip-Hop Albums, Big Geminii sews on Pacesetter stripes for "History in the Making," which leaps 60-43 in its 2nd week with a 77% sales increase.

-Susan Visakowitz with additional reporting by Keith Caulfield, Raphael George, Katie Hasty, Wade Jessen, Geoff Mayfield and Silvio Pietroluongo

Click here for last week's Chart Shakers article.