'Mexican Madonna' Gloria Trevi Would Give Donald Trump a Second Chance, If ...

Gloria Trevi's life story is so absolutely insane it became a movie, which she says brought her to tears -- but the "Mexican Madonna" cracked up when we suggested she perform for Donald Trump.

Trevi survived one of the biggest scandals in the history of music -- after shooting to superstardom in the '90s, she and her bf/manager were accused of running a sex cult for minors. The couple fled to Brazil, and Trevi was eventually arrested there and imprisoned for nearly 5 years while awaiting trial.

Oh, and she managed to get pregnant while behind bars. When it was all said and done ... she was acquitted due to lack of evidence.

Soooo ... now that her biopic "Gloria" is out, and she's reviving her career -- we wondered if she'd consider playing Trump's inauguration.

Check out her answer ... she's NOT saying never.