Charlotte Church enjoyed a booze-free 21st birthday party – sparking rumours that she might be pregnant.

The singer turned chatshow host chose to cancel plans for a big birthday bash in Cardiff’s Hilton Hotel this weekend in favour of a more low-key affair at her home with just family and close friends. She is reported to have also quit smoking.

Pals of the Voice of an Angel have noticed that the star has put on a bit of weight in recent weeks, according to reports in the Sun.

Charlotte, who took the day off on Wednesday for her birthday, apparently remained sober throughout the day.

She recently told the Sun that she wouldn’t mind starting a family with her 25-year-old rugby star boyfriend Gavin Henson.

“We’re so happy – I’d like to have his kids. I love him and he’s the one” she said.