The Super Bowl may not be the most star-studded sporting event in Vegas these next few days ... 'cause Dana White's Power Slap 6 Friday night in Sin City had some of the biggest stars in the world, including Tom Brady and Travis Scott!

And we've got a bunch of pics and video from the event.

It wasn't just TB 12 and La Flame in the building ... Charles Barkley, Pat McAfee, Johnny Manziel, Taylor Lewan, Bert Kreischer, IShowSpeed, billionaire Michael Rubin, and a bunch of others were also there for the festivities -- and judging by the stars, it slapped.

Friday night marked the first event White held outside of the UFC's own Apex center ... going down at the Durango Resort, marking a big step forward for the young org.

We talked to Dana backstage during the event (while he wasn't rubbing shoulders with Tom and Travis) ... and asked him about the night.

"This is the first time ever selling tickets. We sold VIP packages. It was a good night," White said with a big smile on his face.