mrs. obama is known for her fashion-forward choices. as tanya riverohe is kicking off the next four years with a bang. >> reporter: over the past four years, it's been bold colors, bare arms and now fresh bangs. no one has influenced women's fashion quite like michelle obama. >> women like the way she mixes labels. she's unafraid to wear color. she seems like she's having fun. >> reporter: as all eyes turn to the inauguration, one big mystery remains, who will the first lady be wearing? ♪ at last >> reporter: in 2009, her one-shouldered white chiffon ball ground made jason wu national time. wt women's wear daily" had the designers sketch their renditions. tommy hilfiger turned to the nens look for first daughters, malia and sasha. >> they're becoming more interested in malia and sasha. >> reporter: the first lady has had a few fashion missteps, ruffling feathers when she wore alexander mcqueen to meet the chinese president. but the first lady takes it all in stride, as she becomes a fashion icon for the ages. capable of changing a company's bottom line