JE1 / WENN 1 / 15

Blast from the past!

On Saturday, the entire Kardashian family were reminiscing on their personal websites over Rob Kardashian's 25th birthday.

Mom Kris Jenner outdid everyone's photos when she posted a practically nude pic of her during her pregnancy with Rob.

PHOTOS: See the Kardashian's family album

Taken when she was 31-years-old, Jenner poses topless wearing just white underwear while showing off her massive baby bump.

"Happy 25th birthday to my wonderful, handsome son, Rob!! Rob, you are the best son a mother could ask for and you make me proud every day. I love you so much!!" Jenner, now 56, wrote on her blog.

PHOTOS: See the Kardashians on vacation!

Jenner and Kim Kardashian celebrated with Rob at his swanky birthday bash that took place at Las Vegas hotspot 1Oak on Friday.

PHOTOS: 9 reasons why Kim Kardashian had a rough year

While Jenner wore a red-hot form-fitting dress, Kim flaunted her famous curves in a white mini dress decorated with patches of silver sequins.


Kris Jenner Says Kim Kardashian Should Keep Ring

Celebrity Secrets

Jenner Gets a Facelife Before Kardashian Wedding