Knock Knock (Monica song)

"Knock Knock"
Single by Monica
from the album After the Storm
ReleasedSeptember 1, 2003
StudioThe Hit Factory Criteria (Miami, Florida)
Length3:41
LabelJ
Songwriter(s)
Producer(s)
  • Missy Elliott
  • Kanye West
Monica singles chronology
"So Gone"
(2003)
"Knock Knock"
(2003)
"Get It Off"
(2003)

"Knock Knock" is a song by American R&B recording artist Monica. It was written and produced by rappers Missy Elliott and Kanye West for her fourth studio album After the Storm (2003). Commissioned following the delay and subsequent reconstruction of Monica's third album All Eyez on Me (2002), the song is built around excerpts of the composition "It's a Terrible Thing to Waste Your Love" (1976) by American vocal group The Masqueraders. Due to the sample, Lee Hatim is also credited as a songwriter. On breezy, summer-tinged "Knock Knock," a blending of 1970s-style soul and hip hop set against steely keyboards and a stony bass, the protagonist warns a cheating boyfriend not to come calling.

J Records released "Knock Knock" alongside fellow Elliott production "Get It Off" as one of two singles that followed leading single "So Gone" during the third quarter of 2003. The song was lauded by critics, who praised its streetwise production and Monica's rap part on the track. A moderate success at the charts, it peaked at number 75 on the US Billboard Hot 100 and number 24 on the Hot R&B/Hip-Hop Songs chart. Its accompanying music video, directed by Chris Robinson, was filmed as a two-part story with "So Gone". A demo version of the song, featuring vocals from West, titled "Apologize" would later be found on an unofficial 2005 mixtape Freshmen Adjustment. In 2018, rappers Tyler, the Creator and ASAP Rocky released a freestyle of the song titled "Potato Salad".