The pop star is envious of the British singer because she is just "too good" and no one can compete with her talent.
She joked: "I want to punch Adele in the face! She is just too good. I saw the Brit Awards and I was just bawlin', just watching her on YouTube, in a little box this big."
Despite her admiration for Adele, Kelly insists the artist she most wants to work with is country singer Miranda Lambert, who she is currently "stalking".
She told The Guardian newspaper: "Miranda is one of my favourite artists. Have I thought about collaborating with her? Uhh - I might think about it every day! I run into her all the time and I swear to God she thinks I'm stalking her and she hates me.
"Every time I run into her, usually I'm intoxicated and I'm slurring, 'We need to sing a song!' at her. She says she wants to do it, but every time she has an album coming out, I do too, so we're both too busy. Or she's sidestepping me."