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Jared Leto, iHeartRadio Awards

Jason Merritt/Getty Images for Clear Channel

The star power just doesn't seem to end for the 2015 iHeartRadio Music Festival!

With just days before the big two-day event takes place, even more musicians have been added to the lineup as special guests and presenters.

As if performers Jennifer Lopez, The Weeknd, Kanye West and Demi Lovato weren't enough, Jared Leto and Josh Hutcherson are also going to be joining in on the fun. E! News can exclusively reveal that James Corden, Courtney Love, Rita Ora, Wilmer Valderrama, Taylor Lautner, Ashley Benson, Joe Jonas, Ashley Tisdale, Nash and Hayes Grier, Kat Graham, Cheryl Burke, Nat Wolff, Becca Tilley, Josh Murray, Nick Viall, Matt Bomer and more will also make appearances.

Lil Wayne, Duran Duran, Sam Smith, Fall Out Boy, Tove Lo, Coldplay, Nick Jonas, Big Sean, Jason Derulo, Hozier, Diplo, Prince, Trey Songz, Walk the MoonLee BriceGeorge EzraTori KellyEchosmithJames Bay, David Guetta, Disclosure, The Killers, Kenny Chesney, The Struts, Zella Day, Shawn Mendes, Blake Shelton will also be taking center stage at the MGM Grand Garden Arena come Sept. 18 and 19.

And if you're unable to head to Sin City to catch the A-listers performing right in front of your very eyes, don't worry! The entire music festival is going to be broadcast live on iHeartMedia radio stations across the country and fans can also stream it on Yahoo Live both nights beginning at 7:30 p.m.

That's not all, folks! Just in case you missed all of those opportunities to listen in on the fun, you can watch the concert series on The CW for an exclusive two-night special beginning on Sept. 29 at 8 p.m.

iHeartMedia's own Elvis Duran, Ellen K, Nikki Sixx, Bobby Bones, Amy Brown, The Breakfast Club, Kane, Romeo, Nessa, Cody Alan, Jonhjay and Rich, Mario Lopez, Jenn Marino and more will also make special guest appearances.

Considering the success of last year's festival—which saw Taylor Swift, Nicki Minaj, Ariana Grande and Lorde as headliners—there's no doubt that we are all in for quite a treat in just a few days.

Are you headed to the iHeartRadio Music Festival? Tell us how you plan to watch in the comments section below!