Jay Z & Alicia Keys (2011) - Alicia Keys debuted new music during her set at our 2011 iHeartRadio Music Festival, but one of her other show highlights at the outing was her collab with JAY Z
Rascall Flatts & Natasha Bedingfield (2011) - Backstage, Natasha revealed that the genre-bending crossover was quite easy because there was "real chemistry."
Lady Gaga & Sting (2011) - Mother Monster's set at our inaugural festival will forever be remembered when Sting took to the stage for a special pair of duet performances of the Ben E. King classic, "Stand By Me," and the 1983 Police tune "King of Pain."
Steven Tyler & Jeff Beck, Sting & Nicole Scherzinger (2011) - It's safe to say that Aerosmith's Steven Tyler was quite the popular guy at our 2011 iHeartRadio Music Festival. Let's face it, he was joined by the likes of Jeff Beck, Sting and former Pussycat Dolls lead Nicole Scherzinger
Lil Wayne & Keyshia Cole (2012) - Weezy showed some love to the ladies when he surprised the crowd with Keyshia Cole and their team-up, "Enough of No Love" at our 2012 iHeartRadio Music Festival
No Doubt & P!nk (2012) - Pop/punk starlets came together during our 2012 iHeartRadio Music Awards when P!NK surprised the audience with a special performance (and a kiss) with Gwen Stefani. It was all for a collaborative number of the group's smash "Just a Girl."
J. Cole & Miguel & TLC (2013) - In retrospect, 2013 was a killer year for our festival. It even saw a collaborative J. Cole number with Miguel ("Power Trip") as well as the debut performance of the rapper and TLC's "Crooked Smile."
Mary J Blige & Prince (2012) - Mary J. Blige brought an icon to the stage for our 2012 iHeartRadio Music Festival set when Prince graced the MGM Grand Arena for the team-up, which included a cover of "Sweet Thing" by Chaka Kahn and Rufus and even a duet of "Nothing Compares 2 U."
Kesha & Joan Jett (2013) - Was it surprising to see Kesha take shots of Jack Daniels and spit out whipped cream during our 2013 iHeartRadio Music Festival? No. Was it surprising to see Joan Jett join the pop star for a performance of "Bad Reputation"? Most definitely
Macklemore & Fences (2014) - Macklemore and Fences found a pretty organic vibe working with one another on their collab, "Arrows." In fact, Fences almost cried when he heard his rapper's verses, so it all makes sense that the two teamed up to perform the number at the Daytime Village at our 2014 iHeartRadio Music Festival
Nicki Minaj & Ariana Grande (2014) - When Jessie J wasn't available to appear at our iHeartRadio Music Festival 2014, Nicki Minaj and Ariana Grande took it upon themselves to churn out a collaborative performance of "Bang Bang."
Swedish House Mafia & Usher (2012) - Swedish House Mafia offered up a treat at our 2012 iHeartRadio Music Festival when they brought Usher on stage for their debut performance of their collaboration "Euphoria."
Ariana Grande & Childish Gambino (2014) - Ariana Grande and Childish Gambino's recording process for "Break Your Heart Right Back" went without a hiccup, so the two decided to perform the cut at our 2014 iHeartRadio Music Festival and it'll forever be engraved in our heads
Macklemore and Ed Sheeran teamed up for a performance of "Same Love" at our 2014 iHeartRadio Music Festival. But who knew that these two would later team up for a sentimental song in honor of the rapper's son called "Growing Up (Sloane's Song)"?
Demi Lovato & Third Eye Blind's Stephen Jenkins (2015) - Demi Lovato got to relive the '90s at our 2015 iHeartRadio Music Festival with a special collaborative performance of "Jumper" alongside Stephen Jenkins of Third Eye Blind. Look at that. iHeartRadio brings the generations together!
Diddy & The Bad Boy Family (2015) - Before Diddy even announced his Bad Boy reunion tour, the old crew got together at our 2015 affair when folks like Mase, Busta Rhymes, Lil Kim gathered together for a set of hip-hop hits
Sam Smith & Disclosure (2015) - Sam Smith and Disclosure are more than just collaborators. They're actually friends and their 2015 set chemistry was a testament to that brotherhood. Still, we gotta ask: When we getting that collab album?
Usher & Chris Brown (2014) - How can you forget that time when Usher literally blazed the stage with Chris Breezy during their performance of "New Flame"? No exaggeration. Usher actually lit his shoes on fire and we have photos to prove it
Shawn Mendes & Hailee Steinfeld (2015) - Leave it to then-budding Shawn Mendes to perform with then-budding Hailee Steinfeld for an acoustic duet of "Stitches."
Fetty Wap & Fall Out Boy (2015) - Pop/rock and hip-hop came together when Fall Out Boy and Fetty Wap delivered a surprise performance of "Trap Queen" at our 2015 iHeartRadio Music Festival, further enforcing our aforementioned genre-bending description. We do not lie