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Nikki Bella and her twin sister Brie Bella stepped out in style at the Teen Choice Awards red carpet on Sunday.

Nikki Bella and Artem Chigvintsev are officially parents! The couple welcomed a baby boy on July 31, just one day before Nikki's twin, Brie, gave birth to a

Take a closer look at Nikki Bella and Artem Chigvintsev's sweetest snaps before the Total Bellas season 5 premiere

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"It's been hard not getting all those first things," pregnant Nikki Bella tells PEOPLE