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Alexa Chung was raised in PrivettHampshireEngland by her English mother, a housewife, and her Chinese-English father, a graphic designer. She is the youngest of four children and has two brothers and one sister. She attended the local comprehensive school, Perins Community College, and later the sixth form Peter Symonds College, Winchester (2000-2002). She had been accepted by King’s College London to read English and by Chelsea College of Art and Design to do an art foundation course, with two 'A' grades (English and Art) and a 'B' (History) at A-level, before being scouted by a modelling agency.
Chung was approached in the comedy tent at Reading Festival at the age of 16 and was taken on by the 
London-based Storm Model Management.
She modelled for teen magazines such as 
Elle Girl and CosmoGIRL! and appeared in adverts for products including FantaSony EricssonSunsilk and Tampax. She also modelled for Urban Outfitters. She appeared in music videos for artists including The StreetsWestlifeDelta GoodremReuben and Holly Valance and starred as Jake in a scripted reality show called Shoot Me, broadcast on Fashion TV in 2005.After four years, Chung quit modelling with the intention of beginning an art foundation or fashion journalism course, having become disillusioned. She had developed a “distorted body image” and “low self-esteem” through modelling. After becoming a famous TV personality, Chung made a return to occasional modelling.
In April 2006, then-model Chung was offered the job of co-host on 
Popworld on Channel 4, a music show known for its irreverent and awkward style of interviews. Chung and co-host Alex Zane also presented a weekly radio show called Popworld Radio in conjunction with the TV programme.[5] The last show aired in July 2007, after Channel 4 decided not to recommission the programme, which had been on air for nearly seven years
Chung has also hosted industry events including the 
Hair Magazine Awards 2007, Diesel U Music Awards 2007 and the Elle Style Awards 2008 and 2009.
She was awarded the Elle Style Award for Best TV Presenter in 2009. Also in 2009, she received Glamour's award for Best TV Presenter at the magazine's annual award ceremony.
Chung left 
Channel 4, and the United Kingdom, in April 2009 in order to pursue a stateside career. She now presents It's On with Alexa Chung for MTV. The live, daily show - billed as TRL's replacement- features celebrity talk, live music and online interaction with viewers. I was very fortunate to have the opportunity to view one of her shows live and I really enjoyed watching the clebritys Dane Cook and the upcoming star  from the movie precious. I also enjoyed being part of the audience it was a great experienvce I didnt know she was a model but my impression was that she was very skinny and quirky but seemed very nice.I would go again if the opportunity was given to me. Sadly the show was canceled due to low ratings and the last show will be on December 17th, 2009.