Fergie and Josh Duhamel
07/28/2013 at 02:00 PM EDT
Just after her husband Josh Duhamel
informed the world he was planning on getting her a push present
got some more good tidings on Sunday at her baby shower at Los Angeles' SLS Hotel.
Early on Fergie took the mic to announce, "Woo! It's my baby boy's first party!" and, appropriately, Adam Lambert arrived as "Let's Hear it for the Boy" played.
Dad-to-be Duhamel was also on hand among guests including Kelly Osbourne, Julianne Hough, Ru Paul, Lance Bass, Adam Lambert, Molly Sims, Gabriel Aubry and Matthew Mosshart.
In addition to serving Fergie's own Ferguson Crest wine, the bar offered Patron Ferg-aritas. Guests sipped their beverages through black and white striped or polka dot straws adorned with little flags with musical notes. The four-tiered cake designed by Dylan Lauren stayed with the black, white and blue theme – one layer had blocks spelling out "BABY" and a teddy bear with Xs for eyes rested at the pinnacle. Teal and clear balloon animals were being made for the kids while bags of blue and white candies were taken home by the kid in others!
The expectant singer
, 38, gave a gift of her own earlier this month when she legally changed her name
, taking on the last name of Duhamel, 40, who she wed in 2009
Since the two have such busy schedules, they've begun making changes to their life to ensure plenty of room for their baby boy.
"I can't imagine having a kid and then not being able to be there – that would just drive me crazy. My head would be at home with mom and baby," he explains. "We want to work it out so that we can be together
; whether I am working, they can come with [me] or if she is working I can go with them. I can't see myself ever wanting to be away from my wife and kid."
– Gabrielle Olya