"Let's Get Crazy" is a song recorded by American singer Cassie. It features a guest appearance from American rapper Akon, who co-wrote the song with Bilal Hajji, Kinnda Hamid and RedOne, with the latter also helming the song's production.

The single impacted rhythmic contemporary radio stations in the United States on August 10, 2009, and was initially digitally released on September 1, 2009, through Bad Boy in association with Atlantic Records. It peaked at number thirty-three on the US Billboard Rhythmic chart.

A reworked version of the song titled "Party Rock Remix," featuring American hip hop-electronic dance music duo LMFAO, premiered shortly after the singer moved to Interscope Records with the Bad Boy roster in late 2009. Despite Cassie originally hinting a music video shoot was being planned, accompanying visuals were not released for the track.

Cassie started working on her sophomore album in 2007, with producers Kanye West, Pharrell Williams and Ryan Leslie, who co-wrote and produced her 2006 self-titled debut album, which spawned the number three Billboard Hot 100 hit "Me & U." In the following year, Cassie released "Is It You" for the soundtrack album of the dance film Step Up 2: The Streets, in which she also co-starred as Sophie Donovan, and a single titled "Official Girl," featuring Lil Wayne. In April 14, 2009, Bad Boy Records released the single "Must Be Love," featuring Puff Daddy, tentatively a part of her upcoming second studio album Electro Love.

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