Gwen Stefani is three months pregnant with her second child.The former No Doubt singer - who already has a 20-month-old son with husband Gavin Rossdale - was thrilled when the pregnancy was confirmed at Los Angeles Cedars Sinai hospital.A source said: "They found out at the hospital and couldn't wait to share the news with everyone. They're absolutely ecstatic, it's something they both really want."Last October, Gwen, 38, revealed she was keen to have more children but wanted to wait until she had finished her tour, which is now over.She said: "Obviously I'm in a race to have another one but I don't want to do it while I'm on tour."The 'Hollaback Girl' singer says becoming a mother to Kingston has changed her life for the better.She said: "I love him so much. He is the best thing that's ever happened to me.

"This morning he woke up at 6am and I was like, 'OK, I'm going to die right now.' I definitely don't get enough sleep, but I'd rather spend time with him.

"I've got this extra-fun, amazing little guy who just wants to hang with me."

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