Christina Aguilera traded in her walking shoes for a set o' wheels at Disneyland ... celebrating her daughter's birthday while also giving her feet and legs a rest.
The singer -- and former "Mickey Mouse Club" member -- took to the Happiest Place on Earth Wednesday, donning matching tie-dye shirts with her partner, Matthew Rutler, and some pals for Summer Rain's 9th birthday.
Her group was escorted by a private tour guide, getting front-of-the-line access to rides like Alice in Wonderland ... but while the rest of her crew was walking around the park, Christina remained seated on a motorized scooter.
She didn't let it crush her Disney groove, though ... Christina was still able to have a blast celebrating her daughter's big day. Oh, and it looks like gettin' splashed on The Matterhorn gave her a little shock -- but hey, you may get wet!