As many know by now, the phrase "Hands up, don't shoot," has been the rallying cry for Ferguson, Mo., protesters in response to the shooting of Michael Brown, an 18-year-old who was gunned down by police one month ago on Aug. 9.

At the top of OutKast's set at the LouFest in St. Louis on Sept. 7 -- just miles away from the festival -- both Big Boi and Andre 3000 threw their hands up, which symbolizes the "Hands up, don't shoot" phrase. They did the gesture right before launching into their 2000 cut 'Bombs Over Baghdad.' Three Stacks wore a jumpsuit with a message ("Can one rest in peace & violence?") that seemed to address Brown's shooting as well.

The legendary group joins a slew of hip-hop artists who have spoken out about the shooting, including T.I., Killer Mike, Talib Kweli and Nelly. The latter, a Missouri native, held his own rally while addressing the protesters. Mike wrote a passionate open letter about human rights and the chaos in Ferguson, T.I. penned a song detailing police brutality and racism and Talib voiced his opinion on Brown's shooting during a heated discussion on CNN.