Lady GaGa feels overwhelmed by her nerves.

The 'Anything Goes' singer has admitted she often feels overcome with anxiety because her new music showcases her real voice, without the pop production of her previous records.

Speaking on ITV's 'Good Morning Britain', she said: ''I'm very overwhelmed, I have mornings when I'm not quite sure what to do with my nerves and I think it's also because people are hearing really my true voice for the first time so I feel very vulnerable.''

The 28-year-old star released her fourth studio album 'Cheek to Cheek' this week, on which she has recorded a series of duets with the legendary jazz crooner, Tony Bennett.

Discussing her work with the 'I Left My Heart in San Francisco' artist, she gushed: ''I've been waiting for this moment and I was excited to be rebellious against my pop career.''

The 'Do What U Want' hitmaker has been so moved by the experience of working with the 88-year-old legend that she decided to ink a trumpet tattoo onto her arm, representing the jazz sound of the pair's album.

Gaga explained: ''I wanted to remember this moment forever ... I wanted this [tattoo] to be the biggest because for me this is the biggest moment in my life.

''I'm really grateful to [Tony] for personal things... I think I sing better on stage with Tony even than I do in the studio.''