So THAT’S Why Ariana Grande Postponed her Show on Tuesday

Not the stomach bug...it was an allergic reaction.

When Ariana Grande postponed Tuesday night's show, just hours before she was supposed to be onstage at Amalie Arena...I automatically assumed she must've come down with the stomach bug that's going around.

I was  w r o n g.

On Wednesday, Ari hopped on Instagram to let us know the real reason that she had to cancel our plans to hang with her at the last minute...turns out, she had an allergic reaction to...TOMATOES.

According to Ariana, her throat ‘pretty much closed up’ - which would explain not being able to perform in Tampa or Orlando this week.

She’ll be back on November 24th and we promise...no spaghetti care packages!!