The two friends checked out Disneyland and stuck around to visit Disney's California Adventure theme park in Anaheim, reported E! online.
Reports suggest the women were there with Aldridge's three-year-old daughter, Dixie Pearl, whose father is Kings of Leon star Caleb Followill.
The model, who is part of Swift's 'Squad' of buddies, posted a picture of the trio having fun on Radiator Springs Racers at Disney's California Adventure on Instagram.
And fans kept each other updated on Swift's day out at Disneyland by posting snapshots of sightings on social media.