Justin Timberlake
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• What a good son! Jake Gyllenhaal spent Mother's Day with mom Naomi Foner at Intelligentsia Coffee and Tea in Venice, Calif. The actor, dressed down in a white T-shirt and blue baseball hat, chatted away with his mom while they waited for their drinks. "They looked adorable and like they were having a great time," an onlooker tells PEOPLE.
• Elsewhere on Sunday, Kelly Osbourne stepped out with David Arquette and some friends at Yellowtail in Las Vegas. The group enjoyed a leisurely dinner prepared by chef Akira Back, and savored the restaurant's signature tuna pizza. After the meal, they headed to The Bank nightclub at the Bellagio.
• Also in Las Vegas over the weekend: Jamie Lynn Spears, who had dinner with 2½-year-old daughter Maddie and some family friends at Simon at the Palms Place. The starlet enjoyed bigeye tuna, while her little one munched on some macaroni and cheese. Earlier in the day, the mother-daughter duo played in the sunshine at the Palms Place Hotel & Spa pool.
• A handful of stars spent Mother's Day doing some good: Halle Berry, Alyson Hannigan and Modern Family's Eric Stonestreet pumped up participants at the 18th Annual EIF Revlon Run/Walk For Women in Los Angeles. Berry sent the runners on their way, cheering for racers as they crossed the starting line. Hannigan, meanwhile, participated in the race with girlfriends, while Stonestreet drove a pace car as his girlfriend ran.
• By JENNIFER GARCIA, MARK GRAY and JESSICA WEDEMEYER
