Long before “My Humps” and “I Gotta Feeling,” The Black Eyed Peas were a burgeoning alternative hip hop group but when Fergie joined will.i.am, Taboo and apl.de.ap during the making of 2003’s Elephunk, it gave them a more mainstream sound. Their pop breakthrough was the lead single “Where Is The Love?” which topped charts in 13 countries. The timing for such a song was perfect. Written just after the 9/11 terrorist attacks — with assistance from an uncredited Justin Timberlake — the lyrics address global and domestic issues, including war, terrorism, racism and gang violence. Today, sadly, the song is still relevant. Buy it here. — K.B.