The song received mixed reviews from music critics, some of them criticizing the use of will.i.am.'s wordplay and characterizing it as "more of the same dancefloor song." Still, others thought that the song was an "exhilarating and whirlwind track." The song became a success in countries like Brazil, Australia, France, and Greece. However, the song has become the band's lowest-charting single to date in the U.S., peaking at number 86.
This is one of three tracks on The Beginning to be produced by Damien "DJ Ammo" LeRoy, the other two being the lead single "The Time (Dirty Bit)" and "Do It Like This".The Beginning's third single was announced on The Black Eyed Peas' official website on May 9, 2011. Described as a "buzzing, hot club jam", it features whooshing synths and slap-funk bass grooves. It is the longest track on the album at close to six minutes. The Black Eyed Peas member will.i.am told Spin magazine that he is proud enough of the song that he'd even play it for Jay-Z. "I would go to Jay's studio and play this be like 'Boom! Check it out!", said Will. "Then I go dirty Caribbean on him on the last verse."
The Black Eyed Peas performing "Don't Stop the Party" in Walmart Meeting, 2011
Monica Herrera wrote for Billboard that "the music is expertly produced, but problems arise when Will.i.am claims the same of his wordplay. On the track 'Don't Stop the Party', he chest-thumps, 'Kill you with my lyricals/Call me verbal criminal.' It's a silly boast for an artist who clearly focuses on beats over rhymes, and is probably better off for it." Andy Gill wrote for The Independent that "with martial synth-stomp riffs, spartan electro beats and loping bass grooves driving tracks whose single-mindedness is signalled by titles like 'Don't Stop the Party'." A positive review came from Bill Lamb, editor from About.com, who went to say that: "BEP boost the beat as they request 'Don't Stop the Party'."Lamb said that "will.i.am starts talking about futurism here again and sure enough we find ourselves in the middle of a futuristic sounding trance break. The party reaches its peak about five minutes into the song, and it is exhilarating." Other positive reaction came from John Bush, editor from Allmusic who went to say that the song is a "scattered moment of respectability" and chose it as an "AMG Pick". Gavin Martin wrote for Daily Mirror that "the operatically ambitious 'Don't Stop the Party' gives way to a briefly terrifying interlude that is more or less a declaration of earth-shaking sonic war."