Coinciding with the slow but steady international expansion of the notoriously exclusive French designer, Isabel Marant is leading Polyvore's brands list this week.

Burberry, Marni, and Givenchy have re-entered the top ten, and almost every currently so popular military-inspired collage has featured a piece by Balmain.

Apart from the 'combat look,' it is mainly bohemian hippie chic and schoolgirl-inspired outfits (oxford pumps have risen to #1 in top trends) that are dominating Polyvore users' tastes right now.

Timeless elegance prevails for celebrities with top ten regular Audrey Hepburn heading this week's list, followed by the less sophisticated but übertrendy Lady Gaga. Twilight's Kristen Stewart has earned fashion credits during award season, and Blake Lively is this week's most popular Gossip Girl.

Finally, the onset of spring has prompted holiday-focused sites such as Calypso St Barth to rocket in online shopping, but vintage site tops the ranking.

Top Brands
1. Isabel Marant (+1)
2. Burberry Prorsum (re-entry)
3. Alexander McQueen (-2)
4. Marni (re-entry)
5. 3.1 Phillip Lim (-1)
6. Givenchy (re-entry)
7. Lulu Guinness (re-entry)
8. Yves Saint Laurent (-1)
9. Balmain (re-entry)
10. Nicholas Kirkwood (re-entry)

Top Sites
1. (+3)
2. (-1)
3. (no change)
4. (-2)
5. (no change)
6. (+2)
7. (re-entry)
8. (re-entry)
9. (-3)
10. (new)

Top Celebrities
1. Audrey Hepburn (+2)
2. Anja Rubik (-1)
3. Lady Gaga (+3)
4. Jessica Stam (-2)
5. Kristen Stewart (+3)
6. Mary-Kate and Ashley Olsen (-1)
7. Blake Lively (re-entry)
8. Abbey Lee Kershaw (-4)
9. Emma Watson (no change)
10. Taylor Momsen (re-entry)

Top Trends
1. oxford pumps (+8)
2. polka dots (re-entry)
3. bohemian (+2)
4. ruffle blouses (new)
5. bucket bags (-4)
6. denim shorts (re-entry)
7. oversized clutches (re-entry)
8. floral print (-2)
9. ballet flats (re-entry)
10. high top sneakers (re-entry)

Polyvore, which lets users express their current fashion preferences in the form of collages, receives five million individual visits a month.