Lisa Marie Presley makes ''horrible animal noises'' before going on stage.

The singer - who is the daughter of late rock 'n' roll legend Elvis Presley - has revealed she has a strange pre-show vocal routine before big concerts and jokes that her high-pitched babbling could be mistaken for an ''exorcism''.

She quipped: ''I do really horrible animal noises to warm up my voice ... I can actually perform an exorcism, I think!''

As well as making animal noises, the 45-year-old star - who is currently travelling across the United States on her 'Storm & Grace' tour - also prepares her voice with a hot drink which includes cayenne pepper, similar to drinks taken by other pop stars including Beyonce.

She added to ''I drink this apple, cider, cinnamon, cayenne pepper concoction before I go out to clear my throat.''

Lisa Marie - who was previously married to the late King of Pop Michael Jackson and actor Nicolas Cage - recently claimed her 20-year-old son Ben Keough, whom she shares with her first husband Danny Keough, bears a resemblance to her iconic father.

She said: ''Sometimes a lot. It depends how he's fixing himself up. Yeah, without question actually.''

Lisa Marie also has famous daughter Riley, 24, with Danny, and five-year-old twins, Harper and Finley, with fourth husband MICHAEL LOCKWOOD.