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!"

She loves to design clothes and accessories, and Nicole Richie has a very special collection for Macy’s set to hit stores and websites this fall.

The capsule collection is called Nicole Richie for Impulse, and Macy’s CMO Martine Reardon told press that the potential for the lineup is impressive.

Stepping out for a night full of fashion, Nicole Richie attended the NBC "Fashion Star" event at the H&M Flagship Store in New York City on Tuesday night (April 24).

The gorgeous fashionista posed solo and with her co-mentor, John Varvatos, for the awaiting photographers looking stunning in a navy and yellow dress adorned with gorgeous red pumps to add a pop of color.