Fergie Celebrates 42nd Birthday With Epic Unicorn Cake and Song From Josh Duhamel and Son Axl

It was also her mom's birthday weekend!

Fergie is known for her singing, but on Monday, the pop star got a sung to! To celebrate her 42nd birthday, Fergie Ferg was serenaded by her hubby, Josh Duhamel, their son, Axl, and a group of family friends.

WATCH: Fergie and Josh Duhamel Celebrate 8 Years of Marriage in Sweet Photo With Son Axl

Duhamel posted a video of the sweet moment to Instagram, writing, “HAPPY BIRTHDAY FERGIE FERG!!! Love you madly, JD, Axl, and Company.”

Fergie kicked off the celebrations with a photo of her mom, Theresa Ann Ferguson, writing, “Happy bday weekend to us mommy!”

The “Fergalicious” singer celebrated with an epic unicorn cake that was covered in icing flowers and a golden horn.

“Happy bday to me!!! Thanks @lasands for my cake. #urbanunicorn #thelastunicorn,” Fergie captioned the photo.

WATCH: Fergie Stuns in String Bikini During Hawaiian Vacation With Josh Duhamel

In addition to her birthday fun, Fergie and Josh also celebrated eight years of marriage back in January with a fun family beach trip.

For more from the anniversary, watch the clip below!