The Backstreet Boys exclusively sit down with ET's Cassie DiLaura in Las Vegas to reveal, this is not their last hurrah at Sin City's Sphere. The group shares they've added three new shows at the iconic venue on New Year's Eve, New Year's Day and Jan. 2. The guys gush over their experience performing in the dome thus far, and share some of their favorite celebrity attendees, from Charlize Theron to Usher. Another celeb they're trying to get to the show? Snoop Dogg! Kevin Richardson talks meeting up with Snoop, whom many call his doppelganger, while at the premiere for 'Paw Patrol: The Dino Movie' (in theaters on Aug. 14). The film features the group's new song, 'Bottle Up,' co-written by Ed Sheeran.
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