It is the first time Mr Mueller has spoken about what happened backstage at a Detroit concert in 2013.
Taylor is suing him for assault and battery over the incident, which she says left her "shocked and withdrawn".
He denies the claim that he grabbed her "bare bottom" under her skirt.
The ex-DJ was fired from his job at a Colorado country music station after the encounter and has now spoken about the legal case with Detroit radio show, Mojo In The Morning.
