This year's 2013 iHeartRadio Music Festival lineup has been announced -- and if you're smart, you're already booking your ticket and hotel room for Vegas on Sept. 20-21!

This year's stacked line-up includes Justin Timberlake, Katy Perry, Elton John, Bruno Mars, not to mention a reunion of Adam Lambert with Queen. Yes, yes, yes! We would seriously also love to see a Bruno Mars / Elton John collabo -- so let's make it happen!

The line-up encompasses pretty much every artist who is heavily played on the radio these days including Chris Brown, fun., J. Cole, Maroon 5, Kesha, and more.

The format of the 2013 iHeartRadio Festival will differ from the previous two years a bit as well. The organizers have introduced "The Village" stage that will showcase artists all day long. But if you think only smaller acts will grace the newly added stage, you couldn't be more wrong. Miley Cyrus, Avril Lavigne, the Wanted, Jason Derulo and more will all perform for fans before the big show gets kicked off.

If you weren't convinced before, we bet you're getting your tickets to iHeartRadio 2013 now! Check out the full lineup below.

2013 iHeartRadio Music Festival Line-Up:

Justin Timberlake
Katy Perry
Elton John
Chris Brown
Keith Urban
J. Cole
Bruno Mars
Maroon 5
Tim McGraw
Thirty Seconds to Mars
Benny Benassi
Queen and Adam Lambert

iHeartRadio Music Festival Village:
Miley Cyrus
Avril Lavigne
The Wanted
Cher Lloyd
Pete Tong
Twenty One Pilots
Jason Derulo