Antonio Brown Performs At College Bar Amid Arena League Team Scandal

Antonio Brown can't help but put that s*** on, even if he's up to his eyeballs in controversy ... 'cause the ex-NFL star hit up an Albany bar and performed his hit song for a bunch of college kids Thursday night -- and TMZ Sports has the video!!

Witnesses tell us AB arrived at Wolff's Biergarten unannounced shortly after midnight Friday ... and the whole crowd was shocked over the surprise appearance, but loved every bit of it.

Once AB was in the bar, we're told he walked right up to the DJ booth and told him to -- well, this is confusing to say -- put "Put That S*** On" on.

Our video shows the Super Bowl champ standing on a platform above the patrons ...  getting the students hyped before starting his viral song.

We're told AB stayed for close to an hour before dipping ... but he didn't leave folks empty-handed -- witnesses say he was passing out free Empire tickets to anyone in attendance.

After the bar, AB seemingly hit up a frat house ... where he crowd-surfed as more students freaked out over his presence.

AB's impromptu concert comes right on the heels of accusations he's an owner from hell for the National Arena League's Albany Empire ... with former coaches and players claiming they weren't paid and lost access to their team hotel rooms, among many other issues.

Brown denies the accusations.

On top of that, Brown has been sued by his jeweler for $1.1 million ... and a judge ordered cops to arrest him over unpaid child support payments, which he claims he made.