E! channel entertainment anchor Michael Yo dropped one hell of a bomb on his twitter followers yesterday when he tweeted about how excited he is for a Dr. Dre and Jay-Z collabo record supposedly dropping this week that might be a single from Dre's long-awaited Detox. The pair have put in plenty of work together over the years, from ghostwriting to producing and rapping on each others' songs, so the announcement (if it doesn't turn out to be some sort of elaborate April Fool's hoax) comes as little surprise.

With Jay-Z already rumored to be working on new material and Dr. Dre still crafting the past decade's most anticipated rap album, it's quite possible the two could have concocted something they just can't wait to unveil. We're not sure how much faith we should put in Yo's declaration, but the announcement made us want to take a look back at the history of Jay-Z/Dr. Dre collbaorations...

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Dr. Dre f/ Snoop Dogg, "Still D.R.E."
RELEASED: 1999

COmplex Says: As the lead single for Dre's long awaited Chronic sequel, "Still D.R.E" was a perfect reintroduction, touted as some of the best verses of Dre's career. For the acclaim, Dre owes much to the song's co-author, Jiggaman, who he openly credited for writing his verses.
CHRONIC QUALITY RATING:

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Dr. Dre f/ Eminem, "The Watcher"
RELEASED: 1999

Complex Says: "The Watcher," another 2001 song about haters trying to test an OG, also owes a lot to Jay-Z's pen. Eminem and Rakim are also rumored to have worked on the lyrics, so it's hard to say exactly how much work Hov put in. Regardless, this is classic D.R.E.
CHRONIC QUALITY RATING:

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Jay-Z f/ Dr. Dre, "Watch Me" (Produced by Irv Gotti)
RELEASED: 1999

Complex Says: A lyrical exercise over the type of production New York so dearly misses right now (Gotti get your shit together!), this forgotten banger from Vol. 3 was Jay-Z running circles around competition while Dre held the stop watch. Makes sense, don't it?
CHRONIC QUALITY RATING:

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Jay-Z f/ Dr. Dre, Rakim, & Truth Hurts, "The Watcher 2" (Produced by Dr. Dre)
RELEASED: 2002

Complex Says: Jay-Z loved the original "Watcher" so much that he had Dre tweak it a bit for his own Blueprint sequel. It's hard to say whether Rakim appears as a favor to Jigga, who he'd go on to admit was the greatest rapper "of his generation," or to Dre, whose Aftermath label he was signed to at the time. The song pales in comparison to the original, but it was still one of the better songs on BP2.
CHRONIC QUALITY RATING:

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Jay-Z, "Trouble" (Produced by Dr. Dre)
RELEASED: 2006

Complex Says: The biggest criticism of Jay-Z's Kingdom Come was it's lopsidedness and "Trouble," a song about how no one is as mighty as the god MC falls on the grounded end of the see-saw.
CHRONIC QUALITY RATING:

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Jay-Z f/ Ne-Yo, "Minority Report" (Produced by Dr. Dre)
RELEASED: 2006

Complex Says: Hov was really grasping for straws on Kingdom Come, including this attempted tribute to the victims of Hurricane Katrina that never quite took off. It's a decent song, and definitely one of the less-wack Kingdom Come tracks, but something about it always seemed forced.
CHRONIC QUALITY RATING:

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Jay-Z f/ Chrisette Michele, "Lost One" (Produced by Dr. Dre)
RELEASED: 2006

Complex Says: Chrisette Michele sang syrupy blues beautifully over Dre's paino loop, but verses that addressed the death of Jay's nephew, his spat with Dame and made people wonder, if only for a split second, if he broke up with Beyonce remain some of Kingdom Come's finest.
CHRONIC QUALITY RATING:

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Jay-Z, "30 Something" (Produced by Dr. Dre)
RELEASED: 2006

Complex Says: You might remember "30 Something" as the diss song for everyone who dared be younger than Jay-Z. It's Jay at his most hypocritical, basically calling other rappers dumb for doing all the things he did when he was their age.
CHRONIC QUALITY RATING:

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