While in town Wednesday for a gig with Colbie Caillat, the singer and Dancing With the Stars alum shared photos on his trip to the park.
In a collage of photos, he acts like a gorilla while standing beside the real thing and imitates an elephant sticking out his tongue.
In another shot, the animal lover graciously gives a spa treatment to one lucky rhinoceros.
"Yes it's true. I'm loofa-ing a rhino," he Tweeted. "What do you do on weekdays?"
Courtesy of Gavin DeGraw