"Stand Up" is a song by Ludacris, released as the second official single in 2003, and taken from his fourth album Chicken-n-Beer. It was his first number-one single, with production by Kanye West and co-production by Ludacris himself.

The chorus consists of three repetitions of Ludacris rapping, "When I move you move" and Shawnna responding "Just like that". After three repetitions, Ludacris says "Hell yeah, hey, DJ, bring that back" Then Shawnna says, "When I move you move" and Ludacris says "Just like that" and they trade parts of the chorus.

It topped the Billboard Hot 100 for the week of December 6, 2003. Ludacris went on to be nominated for a Grammy Award for Best Rap Solo Performance. The song remains Ludacris and Shawnna's biggest hit single to date. It reached numbber three in the UK.

A music video was made for the song, directed by Dave Meyers. Film critic Armond White called the video a "masterpiece" that "conveys the urge of life". The video has been referred to as a "Ludacris acid trip".

He enters a night club with a midget painted silver as a medallion on his necklace. This video also features disabled people in wheel chairs dancing. He appears with a giant shoe which stomps hard enough that the impact takes people off their feet. Young women munch on giant chicken legs and Ludacris chugs out of a huge beer bottle almost his size.A club girl who has no other top other than a designer bra who has been chastised for her model looks by women who spilled drinks on her cleavage is irresistible to Ludacris.She is a seductress who is took off guard by Ludacris who kisses her beer drenched breast that appeal to his alcoholic ways. The young lady soon takes great ecstasy in this. Like other club goers she too has had her share of the cartoonishly big servings that are now straining her metabolism. Ludacris kissing her on the mouth with his beer covered lips is the tipping point causing her adolescent like derriere and thighs to grow immensely . She is brought down a peg and and her buttocks turning more ambiguously mature destroy her innocent like front.Although a seductress she refuses to have the appearance of the stigmatized "ghetto booty" and frantically shakes her gelatinous rear in a attempt to renounce it. A close up reveals her skinny jeans have turned into low riders. Fortunately her dancing causing her "booty" to deflate. She is seen again happily dancing with still wide but not protruding cheeks and finally back to normal. Her jeans however, which started off skintight now have a bit of slack. She laughs the incident off as Ludacris wipes off his lips. The scene ,according to White, was a spoof of the girl dancer in a sweater that says Hollywood in the Nelly "Hot in Herre" video who complains of her butt seeming to get bigger. At the end of the video Ludacris is portrayed as a child with a huge afro and nothing on but a diaper dancing in the club's child drop off area. A female toddler in a diaper turns her head and is shocked by the sight of the Ludacris toddler's antics. Her face is just like the one of the seductress , further implying the true whorish nature of the "booty" girl earlier. He later has his diaper changed and pees on the woman doing it.

An official remix was also recorded, in which Ludacris' third verse was removed and replaced with a verse from Kanye West. The remix appeared on the Akademiks: JeaniusLevelMusikKanye West Vol. 2& Kon The Louis Vuitton Donmixtapes.

Richard Cheese and Lounge Against the Machine covered the song as a lounge-style version on his 2004 album I'd Like a Virgin.

Ludacris also made a remix of the song for the Atlanta Falcons.