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Fabolous Featuring Tamia: "So Into You" - Fab gave CPR to Tamia’s ’98 single when he covered it for his Street Dreams LP five years later. The album’s original version featured Ashanti, but when she couldn’t make the video, Fab re-released it with Tamia reprising her old hook. Smart move! The song peaked at No. 4 on the Billboard Hot 100 chart. The original had only made it to No. 4.Don't miss Tamia tonight on 106 & Park!(Photos: Scott Gries/PictureGroup; Ben Rose/PictureGroup)

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Awesome Twos - Eminem and Royce 5'9" finally did it. Come on Jay-Z and Kanye West, it's time we received a finished version of Watch the Throne. Enough with the promises and false starts of the highly-anticipated collaboration album. If it's more inspiration you guys need, here's a gang of dynamic duos and duets that we love. Hope this gets you guys going.(Photo by Daniel Boczarski/Getty Images for VEVO)

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Usher Featuring Alicia Keys: "My Boo" - Usher’s Confessions wasn’t even close to running out of steam when he released the LP’s fourth consecutive No.1 single in 2004. The song was part of a re-release and helped Ush’s record sales reach diamond domestically.(Photo: Courtesy LaFace Records)

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Erykah Badu Featuring Stephen Marley: "In Love With You" - Erykah Badu's Mama's Gun is the singer's most cohesive album thanks to songs like the Stephen Marley-assisted "I'm In Love With You."(Photo: KMazur/WireImage/Getty Images)

Photo By Photo: KMazur/WireImage/Getty Images

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Rick James Featuring Teena Marie: "Fire and Desire" - Never has a title felt so appropriate. Rick James and Teena Marie have lots of material to show for, but “Fire and Desire,” a cut off James’ 1981 LP, Street Songs, is what usually comes to mind whenever thinking of the two legends’ classic work together.(Photo: Steve Grayson/WireImage/Getty Images)

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Ne-Yo and Jennifer Hudson: "Leaving Tonight" - Jennifer Hudson’s appearance on Ne-Yo’s “Leaving Tonight” serves as a reminder that she should have won American Idol. Featured on Ne-Yo’s sophomore album, Because of You, in 2007, the song was never released commercially.(Photo: Goodloe/PictureGroup)

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Roberta Flack and Donny Hathaway: "The Closer I Get" - Roberta Flack and Donny Hathaway’s “The Closer I Get to You” is yet another single that has helped establish the standard for duets. The song peaked at No. 2 on the Billboard Hot 100 charts.(Photo: Stephen Verona/Getty Images)

Photo By Photo: Stephen Verona/Getty Images

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Marvin Gaye and Tammi Terrell - Few if any share a duet history as celebrated as Marvin Gaye and Tammi Terrell. Together the duo released a string of classic duets including “Ain’t No Mountain High Enough,” “You’re All I Need to Get By,” “Precious Love” and “Ain’t Nothing Like the Real Thing,” just to name a few, in the late 1960s. Method Man and Mary J. Blige remade “All I Need” 24 years later.(Photo: Echoes/Redferns/Getty Images)

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Bobby Brown Featuring Whitney Houston: "Something in Common" - The public’s objection to Bobby Brown and Whitney Houston’s marriage didn’t matter. As evidenced by Brown’s ’93 single, they had something in common. The track stand as the now divorced couple’s only collaboration to date.(Photo: Jeff Kravitz/FilmMagic/Getty Images)

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Babyface Featuring Toni Braxto: "Give U My Heart" - Babyface introduced us to a superstar-in-training named Toni Braxton on this standout single off the classic Boomerang soundtrack. The single peaked at No. 33 on the Billboard Hot 100 chart and set the table for Braxton’s eight-times platinum self-titled debut.(Photo: Ron Galella/WireImage)

Photo By Photo: Ron Galella/WireImage

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Mariah Carey Featuring Ol' Dirty Bastard: "Fantasy" - On paper a Mariah Carey and Ol' Dirty Bastard collaboration sounds like such a bad idea, which is exactly what made the single so brilliant. Carey’s sweet vocals and ODB’s drunken grit somehow matched perfectly over the Top 40 instrumental. “Me and Mariah go back like babies and pacifiers” gets you everytime.(Photo: Scott Gries/Getty Images)

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Patti Labelle Featuring Michael McDonald: "On My Own" - To date, Patti Labelle’s “On My Own” featuring Michael McDonald stands as the only No. 1 single of her stellar 30-plus year career. The song was nominated for Best Pop Vocal Performance By a Duo or Group in ’86. Country singer Reba McEntire covered it in ’95.(Photo: UPN/Landov)

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Prince Featuring Sheena Easton: "U Got the Look" - Prince tapped Sheena Easton for the highest charting single of his Sign o' the Times album. It peaked at No. 2 on the Billboard Hot 100.

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Lionel Richie and Diana Ross: "My Endless Love" - The true classics usually get covered. Lionel Richie and Diana Ross’ “My Endless” is no different. The song’s been covered by Luther Vandross and Mariah Carey as well as country singer Kenny Rogers, but no one’s ever pulled it off like the original pair.(Photo: George Rose/Getty Images)

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Alexander O'Neal Featuring Cherelle: "Saturday Love" - Cherelle and Alexander O’Neal's “Saturday Love” is yet another example that the Billboard charts aren’t the end-all-be-all. Released in 1985, the single only peaked at No. 26, but it’s undoubtedly heralded as a classic single. The song’s incredibly catchy hook is often referenced by contemporary artists.(Photo: Monica Morgan/Getty Images)

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Beyoncé Featuring Jay-Z: "Crazy in Love" - Hip hop's royal couple forecasted their current union through Beyonce's debut single, "Dangerously in Love." Bey fittingly announced the arrival of pop music's next queen over celebratory horns while then boyfriend Jay-Z showed MCs how to guest on an R&B track without losing a bar of credibility. The song shot to No. 1 and became the first of many collaborations to come from the two. Hopefully this will help spark some urgency in Hov and Ye. Leggo!(Photo: Frazer Harrison/Getty Images)