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!
Justin Timberlake helped make the marriage proposal of a lifetime happen when he helped a man named Josh pop the question to his - now fiance - Kim.
After Justin called the couple up on stage, in front of an entire cheering arena in Louisville, Josh got down on one knee as he asked Kim to marry him!
This is the sweetest, most heart-warming video. Check it out!
Congrats to Josh and Kim!