May 15 (UPI) -- Nickelodeon announced Grammy-winning recording artist Tyla will host this year's Nickelodeon Kids' Choice Awards on June 21. Voting for winners in each of the 35 categories for the youth-oriented awards show is open now at KidsChoiceAwards.com. This year's top nominees are Selena Gomez , Ariana Grande , Lady Gaga and Kendrick Lamar , with four nominations each. Jack Black , Dwayne Johnson and Jelly Roll each have three nominations. First-time nominees for this year's ceremony