How old is Fergie?

Stacy Ann Ferguson (born March 27, 1975), better known by her stage name Fergie, is an American singer-songwriter, fashion designer, actress, and part-owner of the Miami Dolphins. She was a member of the children's television series Kids Incorporated, and the girl group Wild Orchid. Ferguson was also a co-host of the television show Great Pretenders. She is the female vocalist for the hip hop/pop group the Black Eyed Peas, as well as a solo artist, having released her debut album, The Dutchess, in September 2006. The album spawned five Billboard Hot 100 Top 5 singles (three of which went to number one) making The Dutchess the seventh album from a female artist to spawn five Top 5 hits.

She is 34

Sarah, Duchess of York (née Sarah Margaret Ferguson; 15 October 1959) She is popularly referred to as "Fergie", as are many famous individuals with the last name Ferguson.
Fergie turned 50 this year.