Ariana Grande is "incredibly sick" and postponing two shows due to illness. The 25-year-old singer rescheduled two Florida dates on her Sweetener world tour Tuesday after falling ill. Grande was to perform Tuesday in Tampa and Wednesday in Orlando. She announced the cancellation in a post on Instagram Stories. "tampa & orlando, i woke up incredibly sick today, ran to my doctor here and have been told to postpone these shows tonight and tomorrow. i'm so beyond devastated," the star wrote. "i will make this up to you, i promise," she vowed. "please forgive me. i love you and i will be back and better than ever as soon as possible. love you." Live Nation Florida said on Twitter the Tampa and Orlando shows will now take place Nov. 24 and 25, respectively. "Ariana is sorry to disappoint her fans and will look fwd to seeing them in November," the post reads. "Tickets for tonight and tomorrow's shows will be honored for the new dates. Refunds are available at the point of purchase." Grande will next perform Friday in Miami, Fla. She kicked off the Sweetener tour in Albany, N.Y., in March and will bring the venture to a close with the rescheduled Orlando show Nov. 25.