Lady GaGa's grandmother "loves" her music.

Angelin Germanotta - the 25-year-old singer's grandma on her father's side - has revealed she always listens to her granddaughter's music and doesn't mind the sexy outfits because she cannot see them.

The 80 year old told Life & Style: "I listen to her songs. I love her music!

"I'm blind, so I really don't see all those sexy outfits. I can only see her legs when she is on TV, so it's good that she wears those outfits, so I can spot her."

Despite being known for her outrageous clothes - including a dress made of meat and nothing but a piece of see-through plastic and some strategically-placed sticky tape - Angelin reveals Lady Gaga was not always so rock and roll.

She added: "She wears jeans and just ordinary clothes with the family. She was a straight-A student, did all of her homework and went to Mass!"

Her grandmother's openness may have inspired Lady Gaga's father Joe to lead an unusual life, with the 'Judas' hitmaker previously confessing she has inherited her wild streak from her dad.

She said: "He was having sex with girls under the boardwalk in New Jersey before he went to see Bruce Springsteen.

"He saw a lot of himself In Me. My first piano teacher was a stripper. My dad told me later. I used to say to her, 'Why do you have such long nails?' She just said, 'Someday you'll understand why.' "