Justin Timberlake and Carrie Underwood will be headlining this year's iHeartRadio Music Festival. The event will take place on Sept. 21 and 22 in Las Vegas.

The official lineup for the festival includes Shawn Mendes, Jason Aldean, Mariah Carey, Logic, Imagine Dragons, Kelly Clarkson, Sam Smith, Rae Sremmurd, Luke Bryan, Jack White, and Kygo.

The iHeartRadio Music Festival will also feature the performance of this year's Macy's iHeartRadio Rising Star winner, which will be announced on July 6.

Where To Buy Tickets?

The main music event will take place at the T-Mobile Arena, and tickets will be available to the general public on June 15 at 1 p.m. EDT.

Capital One cardholders will also have access to a limited number of tickets through a special presale scheduled for June 12 at 1 p.m. EDT.

The Daytime Stage for the 2018 iHeartRadio Music Festival will be held at the Las Vegas Festival grounds and will feature performances by Dua Lipa, Bobby Bones and the Raging Idiots, Lil Uzzi Vert, Belly, and Bazzi.

Where To Watch On Television?

The CW network will also exclusively live-stream the festival via its website and The CW app. The network will also release a coverage of the festival on television on Oct. 7 and 8 at 8 p.m. EDT.

Ryan Seacrest will also serve as the host for the 2018 iHeartRadio Music Festival. This year's music event marks the eighth year of the special concert series.

Tom Poleman's Statement

Tom Poleman, the chief programming officer of iHeartMedia, gushed over this year's lineup.

"There's no other concert with a lineup as diverse at the iHeartRadio Music Festival. We pride ourselves on inviting the most eclectic lineup of headliners you'll ever see on one stage. This festival has the best artists from every style of music heard on iHeartRadio stations across America, giving both our artists and our listeners a once-in-a-lifetime experience," said Poleman.

Justin Timberlake Partners With Bai Brands

In related news, Timberlake also made headlines this week for his collaboration with Bai Brands, the fastest-growing flavored water brand in the United States. The singer teamed up with the label over its Tennessee Braspberry Supertea, which will be available this month.

The partnership came about after Timberlake's video discovering that a blueberry perfectly fits inside a raspberry went viral.

"You know that scene in every movie where the hero proposes some insane plan, where if even one thing goes wrong, everyone is probably going to blow up? That's how we felt when Justin Timberlake said he was going to put blueberries into raspberries. But he did it," said Bai in a statement.