2021 Haircut Trend: Shag Haircut For the last few years, you couldn't scroll through Instagram without spotting someone with a shag haircut, but the style is getting a second wind in the new year — with a twist. "The combination of old-style shag haircuts combined with new-age colour is going to be what makes it different," Mondo said. "We're seeing a lot of colorblocking and fashion colours in combination with these colours." Image Source: Getty / Emma McIntyre