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David Guetta has teamed up with Usher for 'Without You', taken from his album 'Nothing But The Beat'.
The song is the sixth song from Guetta's album to make it in to the Vodafone Big Top 40, it's Usher's first song in the chart since 'DJ Got Us Fallin' In Love' in November 2010.
Take a look at the video for 'Without You'.