Ariana Grande -- Look How Much I Love America! (VIDEO)

Ariana Grande loves America sooooooooooo much -- and she went out of her way to prove it to an arena full of people.

Look, it's entirely possible the people of Tampa forgot what country they live in ... and she was JUST doing a public service. OR she was over-compensating. Watch and decide for yourself.

No donuts were harmed during shooting of this video.