Gwen Stefani and Gavin Expecting Baby #3?

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Gwen Stefani and hubby Gavin Rossdale may have to put on their thinking caps to come up with weird baby names because Gwen is reportedly preggers with baby #3.

Gwen has been talking up a storm about wanting more kids and after sporting a fuller figure, it seems her wish for a huge family may come true soon.

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An eyewitness tells Star magazine, "She was pulling at her shirt to keep it away from her body. It seemed really strange - but then, when she turned to the side, I could see why. She definitely had a baby bump!"

The insider adds, "Gwen is having a really rough time this pregnancy. She had all-day morning sickness for a while with Zuma, but she's sicker this go-round and has been feeling exhausted and dizzy."

Gwen is already mom to three year-old Kingston and 20 month-old Zuma Nesta Rock, so we'd love to see a mini Gwen join the family. Congrats to the happy couple--if it's true!