Go Inside Jennifer Hudson's Cartoon-Themed Birthday Party for Son

Listen to the Oscar winner serenade her little boy.

— -- Jennifer Hudson has been to many A-list bashes in her day, but none of them compare to the fifth birthday party that she and her fiancé of nearly six years, David Otunga, threw for their son, David.

"Look who came to Little David's Birthday Party!" Otunga wrote on Instagram, along with photos of the family with SpongeBob. "Not sure who was more starstruck, him or Mommy & Daddy."

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Also making an appearance were all four Teenage Mutant Ninja Turtles. Michelangelo made a second appearance on his birthday cake too!

For photos from the day, including a video of Hudson singing to the birthday boy, see below.