I Need a Doctor by Dr. Dre

"I Need a Doctor" is a single by American hip hop artist Dr. Dre featuring rapper Eminem and recording artist Skylar Grey. The song was produced by British record producer Alex da Kid, and released for digital download through the American iTunes Store on February 1, 2011. Musically, "I Need a Doctor" is predominantly a rap song, backed by a "spacey", drum-heavy production, with extra piano keys featured in the introduction and the chorus. Lyrically, the song is largely about Dr. Dre and Eminem's close friendship, and how they have often needed and inspired each other in the past. Even though the song was leaked onto the Internet several months in advance of its release, it became a significant commercial success on its official release, particularly in the United States, where it peaked at number 4 on the Billboard Hot 100, making it Dr. Dre's second highest peaking song on the chart ever. It also peaked in the upper regions of many other national charts. As of October 2011, it had sold over 2,206,000 digital copies in the United States alone.