Swedish House Mafia may be breaking up, but they're going out with a bang. The EDM trio performed at the 2012 iHeart Radio Music Festival, but they weren't alone. "This is the first time we're going to perform this song with a very good friend of ours." That friend was Usher.

The first third of the song was a pretty typical Swedish House Mafia performance -- a dark stage with flashing lights around the booth. When Usher entered the stage, the crowd went nuts. Clad in a leather jacket, shades, leather pants and deep red (or, as the trendy Fashion Week crowd would say, "oxblood") kicks, the ever-smooth singer raised the energy tremendously before he uttered a word. The group and Usher performed 'Euphoria,' a cut from the singer's latest release, 'Looking for Myself.'

Usher's dance moves and buttery smooch voice made the performance of 'Euphoria' seem just that -- and at certain points when he raised his arms to rouse the audience further, it seemed almost like a sermon set to a beat. Additionally, the lighting, lasers, smoke and strobes gave an otherworldly effect, especially when Ush danced.

Performances like these remind us why we're so excited for the next season of 'The Voice,' even though this one only just got underway. Shakira and Usher will join the panel in place of Christina Aguilera and Cee Lo Green, who will be touring in support of their own albums, making for some new and awesome judges' performances.