Christina Aguilera celebrating her 30th on New Year’s Eve

The singer-and-actress reached the landmark age on December 18 but was too busy at the time promoting her movie ‘Burlesque’ to celebrate properly so she is making the turn of the year a double celebration.

She said: “My actual birthday was in December and I turned 30! It was a big one - the next chapter of my life. I’m a Sagittarius. But, because I was working so much on the movie, I postponed my birthday party, so New Year’s Eve is my big 30th birthday party.”

Rather than be worried about turning 30, the pop star insists she is pleased to leave her 20s behind her because she now knows so much about life going into a new decade.

She said: “Being 30 is better than being 20, I’ll tell you that. The lessons I’ve learned and how I’ve grown is incredible.”

Christina endured a tumultuous 2010, splitting from husband Jordan Bratman – the father of her two-year-old son Max – in October after nearly five years of marriage.