Boasting tiny tops and low-rise skirts, the Y2K aesthetic regained momentum in 2020 as we looked to the past amid shelter-in-place orders for a boost of fashion optimism. Popular films like "Mean Girls" and music videos like Britney's Spears "Lucky" illustrate some of the hallmarks of the trend, which include bucket hats, butterfly clips, camis and tennis skirts. Logomania, scrunchies, bandanas and butterfly prints also fall in the category.