'Cool for Summer' singer and birthday girl, Demi Lovato is still not done celebrating her 23^rd birthday after her bash last week when she received a puppy. And just last Saturday afternoon, the songstress was spotted having a fun-filled day with boyfriend Wilmer Valderrama and some friends at the Knott's Berry Farm.

Being the young woman that she is, Lovato apparently loves taking extreme rides in the park especially since she is well-protected by her main man, Valderrama. The two were reportedly seen riding several extreme rides in the park including the roller coasters, Silver Bullet and Xcelerator, and just to make the attendee's days even more exciting, the two lovebirds were said to have been packing on the PDA all throughout the day.

"They made a lovely couple," an eyewitness told E! News about Lovato and Valderrama who have just recently made their relationship public. "They indeed looked very happy."

The day seemed like a great once since Lovato's boyfriend even posted a message on social media seemingly still hyped about the day he's had. "Perfect day... Adventurous and filled with 'Oh S--t Moments' hahaha," Valderrama wrote on his Instagram. "Thanks #KnottsBerryFarm!!"

It seemed like the 'Heart Attack' singer and her beau are getting really serious with Lovato previously stating how much she is in love. "Are you f--king kidding me?!! I'm so in love it's ridiculous," Lovato previously shared on Instagram after naming Valderrama her #ManCrushWednesday. "I couldn't be more proud of him."

Lovato also spoke about her new found love in an interview with HuffPost Live. "...As time has gone on, people are seeing us more together and we thought, you know what? If paparazzi gets us, then whatever, but we're in control about what we're able to post online," she explained.

"So we're very open about our relationship. I don't know-I think as I get older and more serious in my life, I just am proud. I'm very proud."