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!
Gossip Girl's Blake Lively always seems to have her dog -- a Maltipoo named Penny -- on the set!
STILL TO COME: Britney Spears, Minka Kelly & more!