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!
Check out this awesome trombone loop cover of Pharrell's "Happy" below.
Now peep this rad acoustic cover of the song with multiple stringed instruments below.