Becky, who? To kick off her Formation World Tour in the most glamorous way possible, Beyoncé gave her caramel-colored strands a solid blonde update. "Her hair color was a very pretty brown, but she wanted it to be lighter and brighter for the tour. She said she needed a Rita blonde!" her longtime colorist Rita Hazan tells InStyle exclusively. "I love her blonde. It's sexy, and on stage, it really stands out. It's a classic Beyonce look, and while she's whipping her hair around and dancing, you can see the multi-dimensional blonde colors." The star's root area was kept dark to create depth, which also played up the tones in her olive complexion. Believe it or not, the entire color-change happened in one appointment, but Hazan pulled it off like the pro she is, thanks to a mix of her True Color Shampoo, Conditioner, and Gloss ($26 each; sephora.com). "I gave her baby blonde highlights to frame her face, and more of a golden/lemon color for the rest," Hazan adds. "It's bright, it's sexy, it's fun, and it's a great summer color." We're all bowing down appropriately. Get a closer look at Queen Bey's new 'do in our gallery, and keep clicking to see even more celebrity hair makeovers.