@MarioLopezExtra wants YOU to win a trip to the #iHeartRadio Music Festival 2014 in Las Vegas! 1. Post a 15-second video on Instagram telling us why you want to go using the hashtags #iHRvegas and #contestentry! 🎥 2. Go to bit.ly/insta_contest to submit your video! 💻 3. Tell your friends to enter! 📱 (at iHeartRadio HQ)

Robin Thicke stopped by iHeartRadio headquarters to curate his own Guest DJ station.

In addition to songs from Paula, the station features a soulful mix of classic from the likes of Bill Withers, The Isley Brothers and The Jackson 5 as well as music from current pop staples like Calvin Harris, Lorde and John Legend.

LISTEN to his station

Photo: Katherine Tyler for iHeartRadio

demilovato stopped by iHeartRadio HQ and we asked her how many tattoos she has. Her answer: "Well, it’s difficult because it’s like I lost count. It’s difficult because, like do you count the ‘Stay’ and ‘Strong?’ Do you count the individual birds? And then I have feathers connected to an old tattoo. So I have no idea. I have a lot. It could be 10. It could be 26!"

Get the full story behind her tattoos HERE

Photo: Katherine Tyler for iHeartRadio