On June 17, 2003, Monica released After the Storm, her 4th album. The song Knock Knock contains excerpts from the opening piano of the Masqueraders' 1977 single It's a Terrible Thing to Waste Your Love. Kanye West previously sampled the track in his own demo recording, Apologize, which later appeared on his 2005 mixtape Freshmen Adjustment. Le 17 juin 2003, Monica sortait After the Storm, son 4e album. La chanson Knock Knock contient des extraits du piano d'ouverture du simple de 1977 des Masqueraders, It's a Terrible Thing to Waste Your Love. Kanye West avait précédemment échantillonné le morceau dans son propre enregistrement démo, Apologize, qui a ensuite été sorti sur son mixtape Freshmen Adjustment de 2005.