Mary Poppins Sings Death Metal, Even Though The Sound Of It Is Something Quite Atrocious

02/25/2015 02:11 pm ET | Updated Feb 25, 2015

We always knew our favorite nanny had it in her.

Watch Julie Andrews' Mary Poppins belt out a death metal version of the Disney favorite "Supercalifragilisticexpialidocious" -- with a little help. Youtuber Andy Rehfeldt's hilarious clip syncs in vocals by Sera Hatchett and Thomas Hinds, with Rehfeldt playing the instruments.

Oh, Mary, you old headbanger you.

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