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Alter egos: Spider-Man, Captain America, Red Power Ranger
Every day is dress up day for Gwen Stefani's youngest son. In May 2013, the 4½-year-old wore not one but two superhero costumes (Spider-Man, far left, and Red Power Ranger, far right) for a family outing and on his way to school. But it was his cutesy all-American outfit (Captain America wears Crocs?) that the then 3-year-old wore in August 2011 while hanging out in Studio City, Calif., that is truly aww-inspiring.
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Alter ego: Batgirl
Jessica Alba's little girl proves even kids with special powers need help sometimes. Here, the cape-clad 4-year-old gets a lift in June 2012 from dad Cash Warren in Santa Monica, Calif.
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Alter ego: Iron Man
Channeling Robert Downey Jr., the After Earth star (trust us, it's him) goes incognito for a May lunch date with Kylie Jenner (not shown) at New York City's Nobu restaurant.
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Alter ego: Batman
At an October 2012 birthday party in Beverly Hills, Calif., the 4-year-old Dark Knight stays close to mom Amy Poehler and brother Abel, 22 months.
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Alter ego: Spider-Man
Talk about spinning a web of intrigue! Kate Hudson's seldom-seen youngest son, 19 months, shows of his Spidey fashion sense on a February family outing to Miami beach.
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Alter egos: Batman, Buzz Lightyear
Holy cute toddler! Sandra Bullock's 3-year-old Caped Crusader is ready to battle the bad guys after leaving his L.A. school in May. And in October 2012, he matches up with mom (she's cowgirl Jessie from Toy Story!) in a Buzz Lightyear suit while trick-or-treating in Toluca Lake, Calif.