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!
Rebecca Black is back with a follow-up to her viral smash "Friday" - and yep, it's called "Saturday" (and it's kinda awesome)!
Check it out: