CHRISTINA AGUILERA ENGAGED AND PREGNANT WITH SECOND CHILD

Oooh Baby! There will be more little voices in the house these days because, 33 year old Christina Aguilera knows how to keep things interesting -- it hasn't even been a week since she announced her engagement to a production assistant ... and now she's pregnant.

Christina and soon-to-be baby daddy/husband Matt Rutler met on the set of the 2010 film "Burlesque," where he worked as a P.A. And things heated up from there.

Aguilera announced they were engaged on Valentine's Day. Christina gave birth to her first child -- Max Bratman -- in 2008.

Pretty crazy timing ... Aguilera lost a ton of weight just last year. Aguilera,  has enjoyed watching her now-6-year-old grow. The "Beautiful" singer took season 4 off from The Voice to spend more time with her family and to focus on her music career. 

She's also taking off season 6 of the show, when Shakira will fill the pop diva's red chair.

The newly-engaged couple and expectant parents have been together for almost three years. They met on the set of Aguilera's 2010 film Burlesque. The seasoned vocalist was previously married to Jordan Bratman. from November 2005 to October 2010, and he shares custody of Max.

VIDEO: CHRISTINA AGUILERA, PITBULL, BRUNO MARS, & NELLY PERFORM ON ‘THE VOICE’ FINALE

The pop diva descended on a platform, while Mr. Worldwide worked up a sweat in his suit. Confetti poured down on them as Shakira and Usher looked on.

“The Voice” capped off its season with a star-studded finale. Christina Aguilera returned to NBC’s singing competition to perform “Feel This Moment” with Pitbull on Tuesday’s show.

Nelly also joined Florida Georgia Line to perform their country collaboration “Cruise,” and Bruno Mars rocked the stage with his latest single “Treasure.” Love Bruno Mars!

Video: Christina Aguilera Performs on Oprah & Download New Music Ft.Nicki Minaj

Christina Aguilera is back and serving up a sexy ne performance with her new single “Not Myself Tonight” live for the first time from New York’s Radio City Music Hall on Friday’s “Oprah Winfrey Show.” XXXtina’s new album Bionic arrives June 8.

Download: Christina Aguilera f/ Nicki Minaj – “WooHoo”

Christina Aguilera the Polow Da Don production from XXXtina’s new album Bionic (June 8). Thi song is HOT!!

Video: Christina Aguilera – Not Myself Tonight

Christina Aguilera is back, channeling her bad girl side. Christina let go of her inhibitions for the night and strips down in the provocative video for “Not Myself Tonight,” the first single from her new album Bionic, due June 8 check in Christina in the Hype Williams-directed clip.