Rihanna, Justin Timberlake and Imagine Dragons lead the nominations for the inaugural iHeartRadio Music Awards. Rihanna leads the pack with seven nods across five categories, including artist of the year, song of the year and best collaboration -- she competes against herself in the latter two with her Mikky Ekko-assisted ballad “Stay” going up against “The Monster,” her duet with Eminem. Timberlake scored five nominations, including artist of the year, and like Rihanna he is nominated twice in the collaboration category for two singles with Jay Z (comeback single “Suit & Tie” and Jay’s “Holy Grail”). Despite a breakout year that yielded them a bounty of Grammys, Macklemore & Ryan Lewis are up for only two honors. Nominations were based on results from the newly minted iHeartRadio Chart, which pulled listener feedback and performance data, digital streaming data from the iHeartRadio platform (including custom station creations) and tags from Shazam and BigChampagne. The data were compiled by Mediabase from the last 12 months. The iHeartRadio Music Awards are scheduled to air May 1 on NBC at 8 p.m. Pacific time.

Artist of the year:

Imagine Dragons
Justin Timberlake
Macklemore & Ryan Lewis
Maroon 5
Rihanna

Song of the year:

"Hold On We’re Going Home" -- Drake ft. Majid Jordan
"Mirrors" -- Justin Timberlake
"Radioactive" -- Imagine Dragons
"Stay" -- Rihanna ft. Mikky Ekko
"The Monster" -- Eminem ft. Rihanna

Collaboration:

"Holy Grail" -- Jay Z ft. Justin Timberlake
"Stay" -- Rihanna ft. Mikky Ekko
"Suit & Tie" -- Justin Timberlake ft. Jay Z
"The Monster" -- Eminem ft. Rihanna
"Timber" -- Pitbull ft. Kesha

New artist:

Florida Georgia Line
Icona Pop
Imagine Dragons
Lorde
Macklemore & Ryan Lewis
Passenger

Country song of the year:

"Boys 'Round Here" -- Blake Shelton
"Highway Don’t Care" -- Tim McGraw with Taylor Swift
"It Goes Like This" -- Thomas Rhett
"Mine Would Be You" -- Blake Shelton
"That’s My Kind of Night" -- Luke Bryan