Six weeks after giving birth to third son Apollo, Gwen Stefani debuted her post-baby body in two different black jumpsuits -- see the pictures Credit: Christopher Polk/Getty Images for Coachella

No doubt, Gwen Stefani is looking fiercer than ever these days! The rocker debuted her post-baby body six weeks after giving birth to son Apollo during a performance at Coachella in Indio, Calif., on Saturday, April 12. Click here to see more pics of Gwen.

The "Hollaback Girl" singer, 44, showed up in a bedazzled custom L.A.M.B. black jumpsuit to perform with Pharrell Williams. Now a mother of three, she finished off the chic ensemble with her signature red lipstick and kept her blonde locks swept up in a high bun.

"Feels good to be out of the cave #Cochella2014 @Pharrell gx," Stefani tweeted a day after her set. The "Happy" crooner retweeted the comment and responded with a kissy emoji face.

Stefani continued the jumpsuit theme as she attended a baby shower the following day in L.A. She wore a more casual, loose-fitting black jumpsuit as she was photographed arriving with baby diapers in hand. She accessorized the stylish look with another bold red lip, leopard-printed sunglasses, and high heels.

Us exclusively broke news back in March that Stefani and husband Gavin Rossdale, 48, welcomed their third baby boy. "Welcome Apollo Bowie Flynn Rossdale 2/28/14," proud dad Rossdale tweeted at the time. "Bowie and Flynn = [our] mothers' maiden names." The rockstar couple are already parents to stylish sons Kingston, 7, and Zuma, 5.