Ed Sheeran, John Legend and Lorde will also be performing.
The singer opened up about his battle with Type 1 Diabetes, and encouraged all his fans to be good citizens.
ET's own Kevin Frazier and Nancy O'Dell accepted the Outstanding Entertainment News Program award.
The longtime ET host was recognized for her illustrious career!
Britney Spears was honored with the inaugural Icon Award at the RDMAs on Saturday.
The ladies dressed to impress Saturday at the Microsoft Theater in Los Angeles!
The 31-year-old actress brought her unique look to the red carpet.
The Hollywood icon would like to have that Oscars moment back.
The 35-year-old singer's album won one of seven awards presented in the Entertainment category.
It's 'House of Cards' meets Broadway stars!
Selena Gomez's boyfriend and ex-boyfriend are both up for the Top Male Artist award.
It's a new chapter in Mandy Moore's life, but MTV is still taking notice!
The actress delivered a moving tribute to her late sister at Saturday's GLAAD Media Awards in Los Angeles.
The 40-year-old country crooner reveals where he plans to put his second award.
