Lady Gaga's mother has joined her on tour in a bid to ensure she maintains a healthy lifestyle.

The singer's mother Cynthia Germanotta is said to have grown concern amid reports that Lady Gaga has been maintaining a liquid diet with little food.

A source told The Sun: "Her mum thinks she drinks too much and doesn't eat enough. She has gone along to keep an eye on her boozing and feed her up."

Lady Gaga is currently on the latest US leg of her Monster Ball world tour.

The singer is set to headline Radio 1's Big Weekend in Carlisle next month ahead of the release of her second album proper, 'Born This Way'.

(by Jason Gregory)