iHeartRadio is putting on its second annual iHeartRadio Music Awards at the end of the month. They revealed the nominees back in February, but now they've announced who will be taking the stage at the ceremony. Rihanna, Iggy Azalea, Sam Smith, Madonna, Jason Aldean, Meghan Trainor, Jason Derulo, Jennifer Hudson, Kelly Clarkson, Snoop Dogg, Nate Ruess, Alesso and Florida Georgia Line will all contribute live performances with Jamie Foxx hosting the show. Taylor Swift will make a non-performing appearance.

According to a press release, the ceremony will feature "unexpected collaborations from some of the top names in music."

"This is the night we celebrate the biggest songs and artists we played for fans on our iHeartRadio stations across America and on the iHeartRadio app over the past year, along with a look at what's coming in 2015," said John Sykes, President of Entertainment Enterprises for iHeartMedia, Inc. "And who better to host than both a Grammy winning musician and Oscar winning performer Jamie Foxx? This is going to be an amazing star packed Sunday night of music on NBC."

"2014 was such an incredible year for so many artists across different genres, so it's great to see them get the recognition they deserve," said Tom Poleman, President of National Programming Platforms for iHeartMedia. "Whether they're new to the scene or industry veterans, each artist's journey is exciting to follow, from their first radio spin to their first iHeartRadio Music Award nomination."

Azalea and Smith are up for the most awards, with five nominations apiece. Both of them are among the Artist of the Year nominees alongside Swift, Ariana Grande and Luke Bryan.

The three-hour iHeartRadio Awards will take place on March 29 and air simultaneously on NBC and iHeartRadio stations.

You can view the full list of nominees here. Vote on your favorites in three categories here.

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