The 22-year-old singer said she loves the reality TV star's lips, reported Ace Showbiz.
"Oh my God, I totally have," Lovato said when asked if she ever tried to copy the star's famous lips, adding, "I look stupid."
Lovato was all praise for the reality TV star, who rose to stardom for becoming part of the popular show "Keeping Up with the Kardashians".
"She looks great. I don't know how she can do it, but I draw lips on and I look ridiculous," Lovato said.