Demi Lovato celebrates Wilmer Valderrama's birthday at wolf sanctuary

Demi Lovato celebrated her longtime boyfriend Wilmer Valderrama's 36th birthday by taking him to a wolf sanctuary on Saturday (30Jan16).

The former That 70s Show star, who nicknamed his group of best friends the "wolfpack", was treated to a one-of-a-kind tour around Wolf Mountain Sanctuary in Lucerne Valley, California, where he spent his birthday face-to-face with rescued wolves.

And Demi took to Instagram.com to post photos of their visit with the creatures, with one even attempting to lick her face.

She added the caption, "Spent the day at Wolf Mountain sanctuary... It was unbelievable. I fell in love with the wolves there and wish I could spend more time with these beautiful, spiritual creatures."

Demi, 23, also paid tribute to her beau in a separate post on his big day, writing, "This beautiful man turned 36 today. I thank God every single day that this man came into my life for so many reasons... But mainly because I'm so blessed to not only have been able to meet such an incredible, loving, funny and inspiring soul, but even more blessed and honored to call him mine. I love you My Wilmer. You deserve the world and more...

"Here's to so many more memories Feliz Cupleanos (happy birhday)."

Demi and Wilmer have been dating for the past six years.