JUST ADDED: 5 Seconds of Summer will be rocking the stage at this year's iHeartRadio Music Festival Village in Las Vegas! The band sat down with Ryan Seacrest to break the news. Click here to buy your tickets now, before they sell out!
The parody expert released a music video to go along with "Tacky" featuring appearances from some familiar faces like Jack Black (who shows off his twerk skills!), "Modern Family's" Eric Stonestreet, and more.
Check out all the tackiness in Weird Al's "Tacky" video below: