Maybe these exes just needed to support each other through the scarey sites?
The X Factor judge was barely recognizable in an all-black ensemble and a hoodie covering her bright blue locks, while the former That '70s Show star decided to ditch an incognito look and strolled the park in a T-shirt and jeans.
The pair and their pals arrived at the theme park with some friends around 10 p.m. and stayed until it closed at 2 a.m. They were seen getting on roller coasters like Xcelerator and Ghostrider, as well as going into scary mazes like "Dominion Of The Dead" and "Black Magic."
However, this isn't the first time the duo made fans wonder whether or not their on-again, off-again relationship has switched back on.
As the biggest names in music ventured to New York for MTV's annual Video Music Awards in late August, the "Heart Attack" singer decided to enjoy a more magical Sunday at the Disneyland Resort alongside Valderrama.
In between park hopping at both Disneyland and Disney's California Adventure Park, the former Disney star made time to enjoy some of the area's signature menu items, like a juicy turkey leg, while enjoying the company of her ex-beau, a group of friends, a tour guide and even members of Valderrama's family.