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(TMZ) - CeeLo knows ... nothing gets a party started like half-naked women jumping up and down -- which is why the guy booked 3 hot chicks to work a trampoline at his Grammy shindig last night, according to TMZ. 

[PHOTOS: 2014 Grammy Awards]

TMZ has footage from inside CeeLo's bash at Lot 613 in L.A. ... and it looked AWESOME -- with food trucks and a mobile barber shop ... and oh yeah, HOT CHICKS ON TRAMPOLINES! 

CeeLo couldn't have been cooler -- and kicked it with our camera guy while he was gettin' shaved up for the party. 

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Gotta stay fresh.

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