"Josh & Me & BABY makes three!!!," she tweeted. She also shared superimposed pictures of herself and her actor husband Josh Duhamel as children.

　　Duhamel posted the same message via his Twitter and Facebook accounts.

　　The couple got married in January 2009 and expressed their desire to start a family during an October 2012 appearance on Oprah's Next Chapter, US Weekly reported.

　　Fergie, 37, whose real name is Stacy Ferguson, joined the Black Eyed Peas in 2002 for their third album, "Elephunk."

　　Duhamel, 40, appeared in the "Transformers" movies and played in the film "Safe Haven."