Is Mariah Carey's new single 'Infinity' a Nick Cannon diss track?

"Shots fired."

That's probably what Nick Cannon's friends have been texting him all morning since ex-wife Mariah Carey dropped her new single Infinity, which is from her upcoming#1 to Infinity greatest hits album.

She may as well have called this one Ex Marks the Spot because her aim is true -- and deadly. Here's a sampling of the scathing lyrics:

Why you mad? Talkin' 'bout you mad.

Could it be that you just lost the best you've ever had?

That's your bag. Yup, that's too bad.

Show is over. You ain't gotta act. ...

If life was a game, you're a free throw. It's nothing that you don't already know.

Ouch.

On a positive note, Mariah finally sounds like her old, gorgeous '90s self again. Mimi, we missed you! Now, let's forget that Elusive Chanteuse thing ever happened, mmkay?

Oh, and how about that video? Love the cheesy animation!

Ain't no being friends. Duh.