While that might not sound like a big deal, this marks the first time Seacrest has ever used a sick day and missed a production day on Idol in all 17 seasons that he's served as host.
Bobby Bones stood in for Seacrest during the episode -- which was taped several weeks ago -- and addressed the regular host's absence at the top of the show.
"I am not Ryan Seacrest; I am Bobby Bones. Sadly, Ryan is sick, and I look most like him so they asked me to fill his shoes tonight," Bones quipped to the audience. "Ryan, love you, buddy. Hope you get better."
While it doesn't appear that Seacrest is still sick, some of his Idol co-stars took to Twitter to comment on the only Seacrest-less episode ever with some sweet messages for the hard working host.
"Proof that @ryanseacrest is human after all," judge Katy Perry tweeted, along with a shocked face and robot emjoi. "And it only took 17 years for you to use your sick day, not bad!"
Luke Bryan chimed in, celebrating the fact that Seacrest finally proved that he wasn't literally a hosting machine, writing, "We missed you for this one! Really thought you might be a robot but glad you’re feeling better. Haha!"