"One Week" is a song by the Canadian rock band Barenaked Ladies, and is the first single from their 1998 album Stunt. It was written by Ed Robertson, who is featured on the lead vocal of the rapped verses. Steven Page sings lead on the song's chorus, while the two co-lead the prechoruses in harmony. The song is notable for its significant number of pop culture references, and remains the band's best known song in the United States. The song hit #1 on the Billboard Hot 100 chart and, fittingly, spent one week at the top.

"One Week" is the band's best-performing single on the charts in both the U.S. and the U.K., though it slightly under-performed several other singles in the band's native Canada. It was the band's first and only number one single in the U.S. on both the Hot 100 (for one week) and the U.S. Modern Rock Tracks (for five non-consecutive weeks). The song spent seven weeks at number 3 on the Hot 100 Airplay and an additional four at number two land locked behind the Goo Goo Dolls' "Iris". Both "The Old Apartment" and "Brian Wilson" barely broke the top 100 of the US chart. The band's US chart success has not been equaled, and was neared only by follow-up singles "It's All Been Done" and "Pinch Me", the first single from follow-up album Maroon; both broke the top 50 of the U.S. Hot 100. Apple used the song at MacWorld 1999 for presenting Mac OS X Server on a wall of 50 iMacs

In 1999, American parodist "Weird Al" Yankovic recorded a parody titled "Jerry Springer", a song about a man's strange obsession with The Jerry Springer Show, for his album Running with Scissors.

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