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The internet's favorite twins pose for photo shoot

At only 4 years old, Alexis and Ava McClure are social media celebrities. The adorable twins are probably the hardest-working toddlers in the entertainment business: They video-blog, have a clothing and accessory line, and model. With their more than 1.1 million Instagram followers and almost 600,000 YouTube subscribers, the sisters’ hard work is clearly paying off.