Katherine Jenkins has admitted she thinks her singing voice is better than ever since she became pregnant. 

The 35-year-old mezzo soprano is eagerly awaiting the birth of her first child with husband Andrew Levitas and has revealed her changing shape has added depth to her vocals.

Speaking to HELLO! Magazine Jenkins explained: ''A lot of female singers say their voice is better when they're pregnant and I think that's happening to me.

''My voice is bigger and more rounded, so I'm loving being pregnant and don't want it to end.''

However, Jenkins is worried her voice could 'scare' her unborn baby.

She added: ''I just hope I am not scaring her with the volume and vibration of my voice.

''She'll either be in there enjoying my singing or she'll eventually start kicking and saying, 'Be quiet Mummy, you're too loud.' ''