Hailey Bieber expressed irritation in an interview last fall about rumors that she was pregnant, saying, “When there comes a day that that is true, you, you as in the internet, will be the last to know.” The internet received its notification Thursday, when she posted the announcement of her pregnancy and four photos on Instagram, tagging her husband, Justin. A representative told People that the model is just past six months pregnant. Bieber, 27, and her pop singer husband, 30, married in September 2018. They’ve since both dealt with health issues, per NBC News. Justin Bieber announced in 202…