Which Barbie line, launched in 2004, focused on contemporary mix-and-match fashion?

Barbie Fashion Fever was the line launched in 2004 around contemporary mix-and-match fashion.

The Fashion Fever concept presented Barbie in modern clothing and accessories designed for coordinated styling. Rather than centering on one historical costume or a single luxury designer, the line emphasized youthful, trend-oriented outfits that could be combined across dolls and wardrobes.

Fashion Fever belongs to the period when Mattel increasingly organized Barbie products into named fashion lines. This approach made the clothing itself a major collecting and play category, with separate garments and accessories complementing the dolls.

The line is sometimes confused with Barbie Basics, introduced later with a focus on little black dresses, or the Barbie Fashion Model Collection, known for collector-oriented Silkstone dolls. Those lines have different concepts and launch dates.