All Blue Outfits: Jessie J V. Iggy Azalea
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Fashion Face Off: Jessie J V. Iggy Azalea

2. All Blue Outfits: Jessie J V. Iggy Azalea
Jessie chose a quirky blue top and trouser combo for her red carpet outfit, while Iggy went for classy cutouts. We think it's a close call, but one thing's for certain - royal blue looks AMAZING on blondes. Picture: PA/Getty