Since the release of Mary J. Blige's latest offering, The Breakthrough, and Jamie Foxx's second studio LP, Unpredictable, the two R&B artists have waged a fierce battle for the coveted top spot on Billboard's albums chart.

According to the latest SoundScan figures, sales of just over 118,000 copies secured Mary J.'s The Breakthrough a week-four coup, dropping Foxx's Unpredictable to #2. Foxx's LP sold over 103,000 copies, nudging total sales of the album past the 1 million mark. Blige previously bested the Oscar-winning actor in the first round by a 130,000-copies-sold margin, but Foxx turned the corner and took back-to-back #1s during weeks two and three.

Blige and Foxx's Billboard tussle has had its fair share of spectators, but none have had what it takes to intervene. The Breakthrough and Unpredictable were the only two albums on this week's Top 200 to crack 100,000 scans. The closest challenger to the Blige/ Foxx reign was America's newest "Idol," Carrie Underwood. Her debut, Some Hearts, climbs two chart positions this week to finish third with 77,000 copies sold. Newlywed Eminem's Curtain Call: The Hits slips one spot to #4 with 76,000 copies flying off shelves. And Notorious B.I.G.'s Duets: The Final Chapter jumps from #7 to #5 with just over 52,000 sales.

The usual suspects round out Billboard's Top 10: Mariah Carey's The Emancipation of Mimi holds the chart's #6 slot with 50,000 copies sold; Nickelback's All the Right Reasons follows at #7 with sales nearing 48,000; Chris Brown's self-titled debut surges four spots to #8 with just under 47,000 scans; Black Eyed Peas spend a third-straight week at #9 with sales of 40,000 and change for their Monkey Business; and the career-spanning The Legend of Johnny Cash collection claims this week's #10 with nearly 40,000 discs sold.

Sales of the Strokes' First Impressions of Earth plunged 65 percent its second week in stores. The New York band's third LP slipped from #4 to #18 with 31,000 copies sold.

It wasn't the most remarkable week for debuts, but several newcomers did manage to infiltrate Billboard's latest albums chart. Orange County, California, hardcore act Bleeding Through's The Truth was the highest-charting of this week's newcomers, finishing at #48 with sales of 17,000 plus. The self-titled debut from New York rockers Morningwood opens at #102 with close to 9,000 scans. The soundtrack to "Underworld: Evolution," which features contributions from My Chemical Romance, Hawthorne Heights, Slipknot and Alkaline Trio, follows at #106 with over 8,000 copies sold. And the soundtrack to the Disney Channel Film "High School Musical," featuring a bonus track from B5, debuts at #143 with 6,500 copies sold.

Check out the feature [article id="1517359"]"Throwback With Mary J. Blige"[/article] for more on Blige's musical Breakthrough.

Head to MTV News RAW: Jamie Foxx on Overdrive to get up close and personal with Mr. Unpredictable.