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 reality star siblings seemed to be having a nice time.
Brown, Songz and Kylie all shared photos from the meet-up on their Instagram accounts.
Last weekend, the Jenners were among the stars atÂ Brownâ€™s charity kickball game.
Check out the new friends below!
Photos: Getty Images