Christina Aguilera Rocks Tiny Baby Bump in Mini Black Bustier Dress For New Orleans Festival Performance: Picture

Christina Aguilera performs during the 2014 New Orleans Jazz & Heritage Festival at Fair Grounds Race Course on May 2, 2014 in New Orleans. Credit: C Flanigan/FilmMagic

Rocking that tiny baby bump! Pregnant Christina Aguilera put her growing belly on full display as she headlined the 2014 New Orleans Jazz & Heritage Festival in New Orleans, LA., on Friday, May 2.

The "Beautiful" singer, 33, performed for the first time since Us exclusively broke news that she's expecting her second child, a baby girl! During her performance, Aguilera stunned in a short black bustier dress and matching jacket. She accessorized the look with a hat and sequined fishnet tights.

"Mama's comin' to play...New Orleans jazz fest, here we come! #jazzfest2014," the star tweeted before hitting the stage. She later quipped: "Pop, soul, and a little rock n' roll! Thanks for inspiring my most eclectic set list yet #jazzfest2014 XoXtina."

Aguilera clearly has been keeping busy despite stepping down as a coach for the upcoming season of The Voice. On April 28, she confirmed that Gwen Stefani would be taking her spot during season 7 of the NBC singing competition. "So excited to have you join #TheVoice squad @GwenStefani! Welcome to our crazy fam! Kisses- xoxo #blondesdoitbest," she wrote.

The No Doubt rocker wasted no time responding. ".@xtina congrats on yr baby," Stefani, 44, wrote on April 30. "Bunny Apollo & i cant wait to hang out w all the crazies #thevoice #surroundedbyboys gx."

This will be the first child for Aguilera and her fiance Matt Rutler. She already shares son Max, 6, with ex-husband Jordan Bratman.