Rap Genius = "crowdsourced explanations of lyrics and historical texts.”

And now they have $15 million from rap connoisseurs A16Z.

Today I learned that there are a half dozen versions of "99 Problems".

Jay Z's "99 Problems" is still my favorite.

In honor of their fundraising, let us watch Jay-Z's "99 Problems" video...

See also: Is "99 Problems" legally accurate?

Ben Horowitz explains why Rap Genius has a future:

"Rap Future is creating an alternative to hyperlinks."

An example is this annotated State of the Union:

Even Grantland loves this investment!

Grantland points out this tweet: “maybe now that rap genius got their google bomb prize money they can afford to hire people who actually know things about rap music.”

Oh snap!