Adele is planning to spend the rest of the year in America.

She said: "I'm in America for eight months. I'm on tour and then I'm going to have Christmas in America. I haven't done that before, I'm really excited."

The 'Hello' singer has given up drinking on the road, is making regular trips to the gym and while in the US has developed a love of organic health store Bristol Farms.

She is quoted by The Sun newspaper as saying: "Oh my god, Bristol Farms - it's like a better Whole Foods with brands. I love it. I had a field day there yesterday."

Perhaps one of the reasons why Adele is planning an extended stay in the US is that it was recently revealed she is wanted to provide the entertainment at the Super Bowl halftime show.

A source said: "There is nobody bigger in the world than Adele right now and organisers are doing absolutely everything they can to try to persuade her to sign up. She's sold out every date on her tour, everyone wants a piece of her and they know they can bank on her bringing in the viewers."

However, one thing stepping in the way is the pop star's notorious battle with stage "nerves".

The insider added: "It's Adele's nerves that are the issue -- it hasn't been an easy sell."

If she does agree to the massive gig, she would be heading to Houston's NRG Stadium in Texas on February 5, where the NFL game will be held.