"All systems go," Fergie says of her brand-new baby.
Axl Jack Duhamel's ready to get it started.
Proud mom Fergie posted an Instagram shot of her new baby in headphones on Tuesday after he'd passed an exam.
"Hearing test complete," she wrote. "All systems go." Her shot came alongside one from husband Josh Duhamel, who added on Twitter, "#paparazziyoucanleaveourhousenow."
The Black Eyed Peas singer and the "Transformers" actor welcomed their first child on Aug. 29. The two have been married since Jan. 10, 2009.
In 2012, Fergie said she was focusing on her shoe line and other projects rather than focus on a follow-up to solo debut "The Duchess." Black Eyed Peas remain on hiatus after years of heavy-duty touring.