Rihanna, Justin Timberlake Top Finalists for iHeartRadio Music Awards

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Barbados-born Rihanna has more than 85 million Facebook fans, far bigger than the population of the pop star's island home, with nearly 15 million in the U.S. alone, according to Socialbakers, a third-party analytics site used by Facebook.

First-ever Clear Channel awards show to air May 1 on NBC from L.A.'s Shrine Auditorium.

Rihanna, Justin Timberlake and Imagine Dragons are among the leading finalists for the first-ever iHeartRadio Music Awards, set to air May 1 on NBC from the Shrine Auditorium in Los Angeles.

The "Stay" singer landed seven total entries in five categories, including artist of the year, song of the year and best collaboration -- for "Monster," her duet with Eminem. Timberlake has five entires in four categories, including artist and song of the year. Imagine Dragons are up for four, including artist of the year and alternative song of the year, for "Demons."

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Macklemore & Ryan Lewis and Maroon 5 round out the artist of the year category, and the best new artist prize will pit Florida Georgia Line, Icona Pop, Imagine Dragons, Lorde, Passenger and Macklemore & Ryan Lewis.

As previously reported, the telecast will feature "this year's biggest artists and songs" along with "live performances, never-before-done duets and collaborations," including performances streamed from other venues in Los Angeles.

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Nominees for the awards were based on results from the newly introduced iHeartRadioChart, which compiles airplay-based listener feedback and performance data, digital streaming data from the iHeartRadio platform and sales, social video data and tags from Big Champagne and Shazam. The data was compiled by Mediabase based on data from the past 12 months.

Artist of the Year
Imagine Dragons
Justin Timberlake
Macklemore & Ryan Lewis
Maroon 5

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

Best 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. Ke$ha

Best New Artist:
Florida Georgia Line
Icona Pop
Imagine Dragons
Macklemore & Ryan Lewis

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

Hip-Hop/R&B Song of the Year:
"Blurred Lines" – Robin Thicke ft. T.I. & Pharrell 
"Hold on We’re Going Home" – Drake ft. Majid Jordan
"Holy Grail" – Jay Z ft. Justin Timberlake
"Pour It Up" – Rihanna
"Started From the Bottom" – Drake

EDM Song of the Year:
"Get Lucky" – Daft Punk ft. Pharrell
"Stay the Night" – Zedd ft. Hayley Williams
"Summertime Sadness" – Lana Del Rey ft. Cedric Gervais
"Sweet Nothing" – Calvin Harris ft. Florence Welch
"Wake Me Up" – Avicii

Alternative Rock Song of the Year:
"Demons" – Imagine Dragons
"Do I Wanna Know?" – Arctic Monkeys
"Pompeii" – Bastille
"Royals" – Lorde
"Safe and Sound" – Capital Cities

Best Lyrics:
"Wake Me Up" – Avicii (Vocals by Aloe Blacc)
"I Love It (ft. Charli XCX)" – Icona Pop
"Say Something" – A Great Big World
"Same Love" – Macklemore & Ryan Lewis
"Wrecking Ball" – Miley Cyrus

Best Fan Army:
Arianators – Ariana Grande
Little Monsters – Lady Gaga
Lovatics – Demi Lovato
Mahomies – Austin Mahone
Rihanna Navy – Rihanna
Swifties – Taylor Swift