and Joe Jonas
meet up backstage at the iHeartRadio Music Festival
held at the MGM Grand Garden Arena on Friday (September 23) in Las Vegas.
Also pictured: the event's host, Ryan Seacrest
, posing with girlfriend Julianne Hough
in the VIP lounge.
"What happens in vegas ends up on #iheartradio! Great night...let's do it again tomorrow!" Ryan tweeted
along with a pic of him and the ...