The fourth studio album by the American rock band, originally released in August 1989. After the death of founding guitarist Hillel Slovak and the subsequent departure of drummer Jack Irons, vocalist Anthony Kiedis and bassist Flea regrouped with the addition of guitarist John Frusciante and drummer Chad Smith. Frusciante's influence altered the band's sound by placing more emphasis on melody than rhythm, which had dominated the band's previous material. Returning producer Michael Beinhorn favored heavy metal guitar riffs, as well as overdubbing perceived by Frusciante as excessive, and as a result, Beinhorn and Frusciante constantly fought over the album's guitar sound. Amazon.co.uk The Chili Peppers finally hit their stride with Mother's Milk, for the first time making their breakneck mix of funk, rap, and metal smooth enough to attract the masses, while keeping it raw enough not to alienate old fans. They've straddled that edge ever since. It didn't hurt that they offered a pretty mainstream cover of Stevie Wonder's "Higher Ground" to introduce the album. That single though, and the rest of Mother's Milk (including "Knock Me Down" and the randy "Sexy Mexican Maid") is pure Pepper--from Anthony Kiedis's in-your-face vocals to Flea's chattering bass. Milk was also guitarist John Frusciante's debut with the group. --Michael Ruby