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6 May 2014, 11:38
Watch Pharrell and Gwen Stefani hook up to perform their 2004 hit song.
While everyone else spent the Bank Holiday at the Met Gala Pharrell was getting comfortable on the set of The Voice USA before he takes a seat as a coach for the show next season.
The 'Happy' Singer told the audience to "make some noise for the queen" as he was joined by Gwen Stefani who performed her 2004 Pharrell-produced track 'Holla Back Girl'.
Watch the performance above.
It's not the first time Gwen and Pharrell have reunited to perform together as of late. The two hooked up at Coachella last month to surprise fans with a special performance.