TMZ got the singer at LAX where TMZ's photog made a valiant effort to get Ashanti to talk about Nelly's alleged rape case. TMZ broke the story ... Nelly's accuser says the attack happened early Saturday morning on his tour bus.
He's denied the allegation -- but remember ... Ashanti and Nelly famously had a bad breakup. TMZ wondered if she'd have his back. We'll say this, she's nowhere near as supportive as Akon. Instead, her thing is just "say less."