1. Video: David Guetta Discusses Usher Collaboration at iHeartRadio Fest

    September 26, 2011 2:25 PM EDT 0 0 0 Saturday night at the iHeartRadio Music Festival was all about high-profile collaborations: Lady Gaga sang with Sting , Rascal Flatts brought out Natasha Bedingfield , and Steven Tyler brought out Jeff Beck , Randy Jackson and Nicole Scherzinger . N ...