Running a close second to the Hollywood baby boom is the must-have-dog trend. Some celebrities, like Britney Spears and Tori Spelling, do the dog-baby thing in tandem. But others -- such as Jessica Biel, Rihanna, Gisele BÃ¼ndchen and Paris Hilton -- are sticking with just their pup companions for now. Come meet some stars and their pampered pooches here!
Ethan Hawke, together with daughter Maya (her mom's Uma Thurman), walk their dog in New York City's West Village.
STILL TO COME: Paris Hilton, Sandra Bullock & more!
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