iHeartRadio Music Festival | Entertainment News, Photos, and Videos

Matt Bomer poses backstage while attending the 2015 iHeartRadio Music Festival on Saturday (September 19) at the MGM Grand Garden Arena in Las Vegas.

Also in attendance at the event were Jennifer Lopez (who also performed during the concert), musician James Bay, and The CW’s Crazy Ex-Girlfriend star Rachel Bloom.

Matt is starring on the upcoming series American Horror Story: Hotel and his co-star Cheyenne Jackson recently marveled over his super hot looks.

“Matt looks like he’s carved out of cream cheese. He’s just so perfect and smooth and gorgeous,” he told Out magazine. “We were in hair and makeup one time, sitting side by side, and I was like, ‘Are you kidding me with that face?’”

FYI: J.Lo is wearing an Altuzarra jacket, House of CB jumpsuit, and Jimmy Choo shoes.

Jennifer Lopez hits the stage to perform at the 2015 iHeartRadio Music Festival on Saturday night (September 19) at the MGM Grand Garden Arena in Las Vegas.

The 46-year-old entertainer made a special announcement at the event and it was very fitting as it had to do with her Vegas residency starting in January.

Jennifer announced that the residency will be called All I Have and she also unveiled the artwork for the show.

The residency begins on January 20 at the AXIS theater stage in Planet Hollywood Resort & Casino. Tickets are on sale now at jlovegas.com!

FYI: J.Lo is wearing a Michael Costello jumpsuit with Topshop shoes.

Ashley Tisdale keeps close to husband Christopher French as they arrive at the 2015 iHeartRadio Music Festival held at MGM Grand Garden Arena on Friday night (September 18) in Las Vegas.

The 30-year-old actress joined social star brothers Nash and Hayes Grier, Taylor Lautner and Josh Hutcherson.

“Caught up with @wilmervalderrama on our way to @iheartradio. Las Vegas here we come!!!” Ashley captioned on Instagram en route to Vegas.

Nash is also pictured picking up Hayes from Dancing With The Stars practice earlier in the afternoon.

FYI: Hayes is wearing a Scott Langton shirt.

30+ pictures inside of Ashley Tisdale, Christopher French and more…More Here! »

Jason Derulo strips off his shirt on stage while performing at the 2015 iHeartRadio Music Festival held at MGM Grand Garden Arena on Friday night (September 18) in Las Vegas.

The 26-year-old singer, who just celebrated his birthday earlier in the week, hit the stage with Demi Lovato, Sam Smith and duo Disclosure.

PHOTOS: Check out the latest pics of Demi Lovato

“Morning VEGAS. Don’t worry I am excited to be here – that’s just my ‘Jetlag is a b****’ face,” Sam wrote on Instagram just hours before hitting the stage.

25+ pictures inside of Demi Lovato, Sam Smith and Jason Derulo…More Here! »

Jared Leto hits the stage to introduce Kanye West‘s performance at the 2015 iHeartRadio Music Festival on Friday (September 18) at the MGM Grand Garden Arena in Las Vegas.

The 43-year-old actor gave the rapper a pretty epic introduction, coming up with tons of terms to describe the entertainer.

“Visionary, artist, madman, musician, producer, provocateur, designer, director, innovator, husband, father and just maybe the future president of the United States of America. Ladies and gentleman, the one, the only, Kanye West,” the Oscar-winner said in his intro.

Also pictured inside at the festival: Chris Martin performing with Coldplay and Brandon Flowers with his band The Killers.

FYI: Jared is wearing a custom Enfant Riches Déprimés leather jacket and Pierre Hardy sneakers.