In this week's Hip-Hop and R&B charts, Alicia Keys and Amy Winehouse trade places, Mary J. Blige holds tight to the Top 10 and Dipset's Jim Jones debuts in the Top 20.

Alicia Keys may have been edged out by Amy Winehouse last week, but she climbs back to the No. 2 spot with 53,100 copies sold of As I Am in the past week, according to Nielsen SoundScan. After 15 weeks, Keys continues to dominate to the tune of 3,149,600 albums sold.

British crooner Amy Winehouse continues her post-Grammy sales surge, sliding one spot to No. 3 with 51,500 copies sold of her debut album, Back to Black. After 50 weeks on the charts, Winehouse has scanned 1,700,700 discs.

Mary J. Blige holds onto her No. 9 spot this week, selling 34,900 copies of her eighth album, Growing Pains. Ten weeks in, the Queen of Hip-Hop/Soul has sold 1,260,500 albums.

Keyshia Cole climbs six spots to No. 12 this week, pushing 29,900 copies of her sophomore effort, Just Like You. After 22 weeks, Cole has scanned 1,198,800 discs.

Right behind Cole is teen phenom Chris Brown, who lingers at No. 13 this week with his second album, Exclusive. After scanning 29,400 discs this week, Brown has amassed a sales total of 1,317,300.

Dipset rapper Jim Jones debuts at No. 19 this week with Harlem's American Gangster, a not-so-subtle reference to Jay-Z's concept album, American Gangster, which finally went platinum after 16 weeks on the charts. In week one, Jones' album sold 24,900 copies.

Next up is Chi-town rapper Lupe Fiasco, who lands at No. 30 with his second album, Lupe Fiasco's The Cool, which sold 19,500 copies this week. After 10 weeks, the Kanye West protégé has sold 358,900 copies.

In a continuing theme, Fergie continues to reign after 75 weeks on the charts. The Black Eyed Pea singer and solo star dropped two spots to No. 33 this week, scanning 18,700 copies of The Dutchess for a total of 3,468,600 albums sold.

Def Jam hitmaker The-Dream climbs 10 spots to No. 36 this week with his debut album Love/Hate, which sold 18,400 copies in the last seven days. The songwriter behind Rihanna's hit "Umbrella" has sold 244,500 copies after 11 weeks.

Speaking of Rihanna, the Good Girl Gone Bad drops three spots to No. 38 this week with 17,600 in sales. After 38 weeks, Rihanna's totals stand at 1,077,900.

Soulja Boy climbs nine spots to re-enter the Top 50, landing at No. 47 with his debut album, Souljaboytellem.com. Rap's very own Teen of da South cranked out 15,600 albums this week, for a 21-week total of 799,400 sold.

R&B crooner J. Holiday, who was arrested for drug possession this week, climbs two spots to No. 49 with 15,500 copies sold of his debut, Back of My 'Lac. After 21 weeks, Holiday has scanned 539,900 discs.

Thanks to a Super Tuesday of music releases look for Janet Jackson, Shawty Lo, Webbie, Cheri Dennis and Erykah Badu to impact next week's charts.