Well it turns out…
That's not the case.
While many assume she became a celebrity nanny to become closer to the stars, an insider says:
Um, we have no words for how absolutely yummers this cake looks!
Fergie is one lucky birthday girl because she got this delish cake for her 39th birthday!
Not only does she get to have Josh Duhamel every day of her life, but she even got him shirtless on her birthday cake.
The Fergalicious birthday queen posted the pic of the cake (above) along with a message on Instagram:
"Thank u @bcompleted, @vveronicarodriguez, @aamarirose & @marissaleaaa for my dope bday cake!!!!! LOL #tadhamilton"
But what we really want to know is if Fergie got to see the real thing later at home??
Well, we're guessing that's a big fat YES because it was the girl's birthday after all!