Britney Spears's dad, Jamie, is showing everubody how much he loves his grandson. He decide to introduce a new drink at his Californian café JJ Chill named after the newborn tot, who has reportedly been called Sean Preston.

"We're introducing a new smoothie in honour of Britney's boy. We're calling it the Preston Smoothie and it consists of only fat-free frozen yogurt, strawberries and mangoes", the JJ Chill co-owner Joseph Nejman revealed.

Britney and her baby, who was born by Caesarean section on September 14, are now believed to have left the hospital, according to Britain 's Daily Sport newspaper.

Only a day after the birth of her child, Britney reportedly ordered a computer games console for her 10,000GBP hospital room.

According to some sources, the new mum's security guard delivered a Playstation to her at Santa Monica's UCLA hospital.

Britney Spears and Kevin Federline posted a message on the star's official website announcing the happy news.

The message, which appears under a picture of Britney and Kevin kissing, reads: "We are ecstatic to announce the birth of our son! Everyone is happy, healthy and doing wonderful. Thank you for all your love and well wishes!! Love Britney and Kevin."