Celebrating all of the ladies that give so much of themselves to provide the best lives that they possibly can for their children, Hollywood's stars join all those around the world in expressing the extreme gratitude to all of the moms out there on this Mother's Day holiday.

Keeping things short and sweet, Justin Bieber took to Twitter this morning while posting a heartfelt message reading, "HAPPY MOTHER'S DAY!"

Stepping out to promote her newest book titled Skinnydipping, Bethenny Frankel made an appearance at the Union Square Barnes & Noble in New York City on Tuesday night (May 1).

The original Skinnygirl looked beautiful in blue as she rocked a color blocked, figure hugging dress and blue heels while greeting her adoring fans at the press event.

After grabbing a bite to eat with friends, Bethenny Frankel was spotted making her way out of the Crosby hotel in New York City on Wednesday (April 11).

The "Bethenny Ever After" reality star looked adorable as she smiled and waved to the cameras in a black and white tweed jacket over a black turtleneck, skinny jeans and knee high Louboutin boots.