Katy Perry wore a floral playsuit as she and a large group of friends headed out for an evening of fun at Disneyland Resort on August 26, 2012. Credit: StarFeine.com/ Splash

Katy Perry is single and ready to mingle -- with Mickey Mouse, Buzz Lightyear, and the rest of the Disney gang.

The "Part of Me" singer, 27, hit Disneyland -- aka the Happiest Place on Earth -- with pals Saturday, just a few days after news broke that she and John Mayer had gone their separate ways.

On Saturday evening, Perry strolled around the Anaheim, Calif. park with a group; she and a girlfriend took a spin on the Buzz Lightyear ride and rocked Mickey Mouse ears inside a restaurant.

Last week, multiple sources confirmed to Us Weekly that the pop singer and Mayer, 34, had split after a fun several weeks.

"She's really upset about it," one insider told Us.

Echoed another source, "She is making it seem like it wasn't serious with John, but she is hurt."