We caught Meg Sunday leaving the Highlight Room in Hollywood after a big night that saw her walking away with 3 Grammy wins, including one for Best New Artist. MTS was clearly on a high, pointing out the united front women put on with a record amount of awards.

Not only did Meg win a handful ... but her collaborator, Beyonce, tacked on a historic 28th Grammy -- making her the leading female artist with the most accolades ever. So yeah, huge night for the ladies.

Oh, and speaking of that, Meg's got a great take on Lizzo's viral moment too. Sounds like Megan aspires to be as candid as she was ... which she fulfilled later in this interview.

At one point while she's still signing autographs from inside her car, someone asks flat out if the Grammy Awards are rigged -- and Meg doesn't make any bones about it ... saying "hell no."

Then comes the natural follow-up question -- well, if that's the case, what about Weeknd's beef/accusations? There's no doubt, she's definitely still got love for the dude -- but she ends up putting the matter in terms of winners and losers.