<P> The iHeartRadio Music Awards is a music awards show that celebrates music heard throughout the year across iHeartMedia radio stations nationwide and on iHeartRadio, iHeartMedia's digital music platform . Founded by iHeartRadio in 2014, the event recognizes the most popular artists and music over the past year . Winners are chosen per cumulative performance data, while the public is able to vote in several categories . The inaugural event was held on May 1, 2014 at the Shrine Auditorium in Los Angeles . Its first two years were broadcast live on NBC, and since 2015 it is simulcast on TBS, TNT and truTV . The fifth annual iHeartRadio Music Awards were held on March 11, 2018 at The Forum . The trophy is manufactured by the New York firm Society Awards . </P> <P> The nominations are based on results from the iHeartRadio Chart . It includes listener feedback and performance data, according to airplay; digital streaming data from the iHeartRadio platform, including sales, social, online video data and tags from BigChampagne and Shazam . The iHeartRadio Countdown, the two - hour weekly program, highlights the top 20 contemporary hit radio songs in the iHeartRadio Chart . The latter is supplied and compiled by Mediabase . In addition, every public - voting category (nine in 2018), includes social hashtags as the primary voting mechanism . </P> <Table> <Tr> <Th> Year </Th> <Th> Date </Th> <Th> Venue </Th> <Th> Host city </Th> <Th> Host </Th> <Th> Song of the Year winner </Th> <Th> Ref . </Th> </Tr> <Tr> <Td> 2014 </Td> <Td> May 1 </Td> <Td> Shrine Auditorium </Td> <Td> Los Angeles </Td> <Td> N / A </Td> <Td> "Stay"--Rihanna featuring Mikky Ekko </Td> <Td> </Td> </Tr> <Tr> <Td> 2015 </Td> <Td> March 29 </Td> <Td> Jamie Foxx </Td> <Td> "Shake It Off"--Taylor Swift </Td> <Td> </Td> </Tr> <Tr> <Td> 2016 </Td> <Td> April 3 </Td> <Td> The Forum </Td> <Td> Inglewood </Td> <Td> Jason Derulo </Td> <Td> "Hello"--Adele </Td> <Td> </Td> </Tr> <Tr> <Td> 2017 </Td> <Td> March 5 </Td> <Td> Ryan Seacrest </Td> <Td> "Can't Stop the Feeling!"--Justin Timberlake </Td> <Td> </Td> </Tr> <Tr> <Td> 2018 </Td> <Td> March 11 </Td> <Td> DJ Khaled Hailey Baldwin </Td> <Td> "Shape of You"--Ed Sheeran </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Year </Th> <Th> Date </Th> <Th> Venue </Th> <Th> Host city </Th> <Th> Host </Th> <Th> Song of the Year winner </Th> <Th> Ref . </Th> </Tr>

Who is hosting i heart radio music awards