The 'Love & Hip Hop' star was booked on a misdemeanor battery charge, but doesn't seem to be sweating it. We got her Wednesday, shortly after she bailed out of Atlanta's Fulton County, and she quickly summed up the case this way ... "It wasn't me."

We broke the story ... a warrant was issued for her arrest for an alleged beatdown of a mall jewelry store employee. Sources close to Tommie tell us she had her bond man pick her up, so she could turn herself in late Tuesday night to get it over with, but she had to spend one night in the slammer.

She was released once she got in front of the judge and posted a $3k bond.