"Get Busy" is a 2003 dancehall song by Jamaican dancehall reggae toaster Sean Paul, from his album Dutty Rock. The song was one of the many hits from the jumpy handclap riddim known as the Diwali Riddim, produced by then-newcomer Steven "Lenky" Marsden, and was the only song that never made the "Diwali" rhythm album on Greensleeves Records as it was more than likely a late entry.

Paul described it as "...mainly a party song. It's not all about smoking weed." "Get Busy" topped the Billboard Hot 100 for three weeks from 10 May 2003, preceded by "In Da Club" by 50 Cent and replaced by "21 Questions" by 50 Cent featuring Nate Dogg. It was performed live on Saturday Night Live in May 2003.

"Get Busy" is written in the key of F minor in common time with a tempo of 100 beats per minute. The song follows a chord progression of Fm−A♭–G–G♭.

The official remix, "Get Busy (Clap Your Hands Now Remix)", features rapper Fatman Scoop and The Crooklyn Clan, the remix uses the instrumental of Sean Paul's previous single,"Gimme the Light", on the near end of the song.

The video for "Get Busy" (directed by Little X) was shot in Woodbridge, Ontario, and released in February 2003. The video was also nominated for two MTV Video Music Awards for Best Dance Video and Best New Artist in 2003. At the end of the video Paul's brother Jason introduces a song, noting it as a brand new single, and Paul then sings part of "Like Glue". Kardinal Offishall makes a cameo appearance in the video.

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