Vanessa Lachey showed off her growing baby bump today in Los Angeles, as she supported Procter & Gamble's "Take a Load Off" campaign, which encourages consumers to switch to cold-water laundry washing this Earth Day. 

OK! GALLERY: VANESSA LACHEY COVERS UP HER BABY BUMP AT THE LAUNCH PARTY FOR MARQUEE - THE STAR IN SYDNEY 

The glowing mom-to-be cradled her belly as she demonstrated how to run a cold wash using Tide detergent. So adorable! 

OK! NEWS: NICK LACHEY ON COACHING PREGNANT WIFE VANESSA IN THE DELIVERY ROOM: "I WON'T BE DOWN BELOW!" 

Vanessa, who wore a vibrant blue blazer and patterned maxi dress, is expecting her first baby with husband Nick Lachey later this year.