Gwen Stefani, Alyson Hannigan and Mel B: Hottest Star Sightings of the Day (PHOTOS)

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The last 24 hours have been all about the family for some celebrities.

Gwen Stefani touched down in style with her youngest son Zuma as the pair arrived at Heathrow Airport on Wednesday. The singer looked chick in a pair of pink-framed sunglasses and a leather jacket, while her 4-year-old son sported a Darth Vader outfit for Halloween.

Stateside, Alyson Hannigan held onto her adorable 3-year-old daughter Satyana, who looked ready for Halloween with her giant Minnie Mouse balloon.

Over in Sydney, Australia, former Spice Girl Mel B and her family got into the Halloween spirit. While the singer wasn’t spotted in Halloween gear, her husband Stephen Belafonte celebrated the scare fest with a bright blue wig. Their two youngest daughters, Angel Iris and Madison, wore a orange headpiece and orange tutu respectively for their trick-or-treating outing.

Outside of Halloween sightings, Lady Gaga brought her Born This Way tour to a sold out crowd in San Juan, Puerto Rico. The 26-year-old super star belted out her hits in a studded outfit as her fans screamed on.

For the hottest celebrity sightings of the day, check out the Celeb Snaps gallery, above.

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