The month of December is full of celebrity birthdays from the music and film world.<br/> <br />First up: director Woody Allen, who marked his 78th birthday on December 1st.<br/> <br />Pop star Britney Spears turned 32 on December 2nd and celebrated the day after by promoting the opening of her Las Vegas, Nevada show.<br/> <br />Jay Z is using his 44th birthday as an opportunity to make a lifestyle change.<br/> <br />The rapper and his wife Beyonce will go vegan for 22 days starting December 4th.<br/> <br />The 18th is a popular day - Director Stephen Spielberg will turn 67, while Katie Holmes will celebrate her first birthday since separating from husband Tom Cruise. She'll be turning 35.<br/> <br />And Brad Pitt will enter his 50s.<br/> <br />Sir Anthony Hopkins will mark both the end of the year and the start of 2014 when he celebrates his 76th birthday on December 31st.
