Teen Vogue has a section on Jennifer’s style changes over the years and here is the order:

1. Teen Vogue’s young Hollywood party 2008
2. Annual Hollywood’s awards gala 2010
3. Palm Springs international film awards gala 2011
4. Annual critics choice awards 2011
5. 68th Annual golden globe awards in Luis Vutton 2011
6. Annual DGA awards 2011
7. SAG awards wearing Oscar de la renta gown; 2011
8. Orange British Academy Film Awards; wearing Stella McCartney 2011
9. Oscars wearing a lovely red Calvin Klein dress, 2011
10. Mui Mui fall runway 2011; wearing a red Mui Mui dress

 Its pretty fun so go and check it out.

 Source