Hollywood couple Demi Lovato and Wilmer Valderrama celebrated the singer’s birthday with a fun and PDA-filled date at a theme park on Saturday.

Lovato and Valderrama were spotted at the Knott's Berry Farm in Buena Park, California where the two enjoyed a Saturdate with a few of their friends, E! News reported. The “Cool for the Summer” crooner and her boyfriend reportedly rode the roller coaster rides first, including the Silver Bullet and Xcelerator.

Keen observers noticed that the couple was always holding hands while they screamed together on the thrill rides. An observer exclusively told E! News that the two “made a lovely couple” and that “they indeed looked very happy.” Aside from enjoying the rides, the couple also had dinner together at one of the park’s restaurants, where an eyewitness reportedly saw them “hugging” and “making out.”

The former “That ‘70s Show” actor even took to Instagram to share their fun-filled post birthday celebration for the singer. Valderrama wrote, "Perfect day... Adventurous and filled with ‘Oh S--- Moments' hahaha.  Thanks #KnottsBerryFarm!!"

Meanwhile, Lovato also celebrated her birthday last week with a new and an adorable furry puppy. According to Entertainment Tonight, the former Disney star introduced the all-black puppy to her Instagram fans with a cute snap of the sleeping dog. Lovato wrote, “Ummm... guys.... meet Batman.....”

The new puppy is a welcome addition to Lovato’s family after the “Heart Attack” songstress lost her beloved dog, Buddy, last month. The musician even posted a collage of Buddy’s pictures on Instagram after she lost him in what she described as a “tragic accident.”

Lovato, who turned 23 last Thursday, also wrote a tribute for Buddy in which she thanked her fans for their support during that “most painful week.” The singer added, “I've been able to stay strong and will continue to get through this difficult time. The out pour of love and support has been unbelievable and it means the world to us."