Josh Duhamel to Fergie: "Happy Mothers-To-Be Day!"
Sharing a photo of himself with his arms and hands around the Black Eyed Peas frontwoman's baby bump, the "Safe Haven" star wrote, "Happy Mother's-to-be day!"
Later, the 40-year-old actor tweeted some advice to his fans, posting, "Let's remember why we're all here. Tell mom you love her."
Following her hubby's advice, Fergie herself tweeted an old photo of her mom with the caption, "Happy Mother's Day to my wonderful mommy Terri & all the strong mamas out there."