Many celebs took time out of their busy Hollywood schedules to pay tribute to their moms on Mother's Day on Sunday.

Jessica Alba went to the Bel Air hotel with her family and was joined by hubby Cash Warren and daughters Honor and Haven.

Gwen Stefani and her husband Gavin Rossdale took their sons Kingston and Zuma to their grandma's house.

Katherine Heigl and her husband Josh Kelley took their daughter Naleigh and their newly adopted daughter to a friend's house. The family outing was reportedly the first time they have been seen out in public with the daughter they adopted in April.

Martha Stewart spent the day with her daughter Alexis and granddaughter Jude. The 70 year-old craft guru enjoyed lunch and wine while balancing her 1 year-old granddaughter on her lap.

Bethenny Frankel and her husband Jason Hoppy were out and about in New York City with their daughter Bryn.

"The Vampire Diaries" star Nina Dobrev gave her mother some flowers and a big kiss on the forehead while spending time together in New York.

Check out photos of the stars, their moms, and their kids...