Katy Perry Spreads Holiday Cheer at Atlanta Children's Hospital Dressed as Mrs. Claus

[MUSIC] Best to worst in bed, May and then Blue? Blue and then May. There it is. [MUSIC] [MUSIC] The way I see things now, I call it stand in the middle of the boat. If someone says, I don??t watch that, [UNKNOWN] guess you do. [MUSIC] Yeah, I checked in with it. It's definitely odd to watch your ex-girlfriend asleep. Right! [MUSIC] I texted Katy happy birthday. It was 4 in the morning, it was like a post- Was like a post midnight haven't gone to sleep yet, it's technically your birthday Stan because how weird is it to be like, I wanna say happy birthday now but I'm gonna wait till' tomorrow afternoon. [MUSIC] [BLANK_AUDIO]

Katy Perry spread some much-needed holiday cheer at the Seacrest Studio at Children's Healthcare of Atlanta. The singer visited with kids of all ages and their families for an unforgettable afternoon.

Ryan Seacrest posted several photos from her visit, and in true Perry form, she went all out. The "Swish Swish" singer decided to dress up as Mrs. Claus for the occasion, which definitely brought smiles to all of the children's faces. "A huge shout out to @KatyPerry for making a very unforgettable visit to #SeacrestStudios at @ChildrensATL!" Seacrest wrote alongside several photos.

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"She dressed up as Mrs. Claus, spent time with the patients and even sang a few of her songs including “Roar.” Thank you Katy for taking the time to create these special memories that the kids will never forget."

In the photos that the Live! with Kelly & Ryan host posted, Perry poses with several patients and even signs someone's cast. See them all below.