INDIO, Calif., April 13 (UPI) --
Just a month after giving birth to her third son
, Apollo, Gwen Stefani
stepped onstage with Pharrell during his star-studded set at the Coachella Valley Music and Arts festival on Saturday.
Stefani joined Pharrell onstage for a performance of her 2004 smash, "Hollaback Girl," which she co-wrote with Williams and his Neptunes collaborator Chad Hugo.
"Feels good to be out of the cave #Cochella2014 @Pharrell gx," the No Doubt frontwoman tweeted.
Diplo, Nelly, Snoop Dogg, Puff Daddy also made appearances.
You can watch the full set below:
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