Katy Perry just left for Manchester ahead of her performance alongside Ariana Grande -- but she looks half asleep ... with a full bedtime getup.
Paps got Katy leaving Paris Sunday morning to board a private jet as she prepared to join Ariana, Justin Bieber and the rest of the star-studded lineup for One Love Manchester.
Unfortunately, Katy looks like she didn't get a good night's sleep. She's got PJs on ... including a pillow and a teddy bear with her too.
Here's hoping she can catch some ZZZs on the way over. She'll be on live in just a few hours.