Lady Gaga, Nicki Minaj, J. Lo, Usher among bevy of A-listers to turn out for the iHeartRadio music festival in Las Vegas
Fergie, Carrie Underwood, Jay-Z, Alicia Keys also burn up the stage
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Nicole Scherzinger shows off her hoop earrings on the red carpet
The former Pussycat Dolls singer left the pop group late last year to pursue a solo career. The resulting album, "Killer Love", drops November 15th in the U.S., though it was released earlier this year in several European countries.
Scherzinger is currently a judge on the American version of "The X-Factor", which debuted to disappointing ratings last week.