Tiesto chat about his latest album and performing at the iHeartRadio Pool Party.
Timeflies Rob and Cal chat with Garrett about their upcoming album, growing up listening to Z100 and they answer Twitter questions.
Lady Gaga discusses closing out Roseland Ballroom, her South by Southwest performance and much more.
R5 performs R5 (I Can't) Forget About You live in-studio.
Little Mix chat with Maxwell about their tour and how amazing the US Mixers are.
Aloe Blacc discusses his recent success and how he got to where he is.
Little Mix discusses life on the road, how they miss home cooking and their beds, having to always look their best and their favorite dress down clothes.
Fifth Harmony discuss life on the road, their pet peeves about each other, what would happen if they only had one hour to get ready for a show and had to share a dressing room and one curling iron.
Zendaya has her "biggest fan" call her and tell her that he found her number online and begins to call it. Find out what happens next.
Naughty Boy and Sam Smith perform La, La, La in the Z Lounge.
Naughty Boy and Sam Smith discuss how they came together and the success that La, La, La has had over seas.