Cute alert! Fergie turned 39 today (March 27) and the singer received the most adorable birthday wish and salutation from her firstborn son, Axl Jack, who made his grand entrance into the world last August.

Fergie's hubby and Axl's dad, actor Josh Duhamel, posted this Instagram picture of the little guy perched on dad's lap with a "Happy Birthday Mommy" notecard in front of him. OMG! We can't even with him. He is such a little looker. Fergie and Josh have to know that they have a little heartbreaker on their hands, and one with a cool name to boot.

We seriously can't even handle how big Axl is getting and how cute he is. This pic had to have melt Fergie's heart!

Damn if Axl's mom doesn't look amazing even though she is on the cusp of 40.

PopCrush joins Axl, Josh and the rest of her fans in wishing Fergalicious a happy and healthy birthday and a wonderful 39th year.

March 27 is the day of the divas, as Mariah Carey and Jessie J are also celebrating their birthdays, too.