Celebrity Bump Watch

After ducking and dodging baby rumors for months, the actress – who checked out an art gallery in Sydney with husband Keith Urban on Jan. 4 – finally revealed her big news three days later. This will be the first child for the couple, who wed in June 2006 (Nicole also has two children with Tom Cruise, Isabella, 15, and Conner, 12).

Three weeks after announcing her pregnancy, Alba was the portrait of casual chic in leggings and flip-flops while strolling in Beverly Hills on Jan 2. The actress and fiancé Cash Warren are expecting their first child together in "late spring, early summer," her rep confirmed exclusively to PEOPLE.

After struggling to become pregnant, Halle Berry is taking advantage of her early 2008 due date. At the Palm Springs International Film Festival Awards on Jan. 5, the Oscar winner said she particularly enjoyed eating off everyone else's plates and not having to hold in her stomach on the red carpet!

Christina Aguilera remained mum about her pregnancy for months, but let her belly do show-and-tell in a nude cover shootfor Marie Claire's January issue. The pop star (pictured Dec. 4) is expecting her

first child with hubby Jordan Bratman.

After months of pregnancy rumors, Nicole Richie – here shopping in Glendale, Calif., on Dec. 8 – confirmed to Diane Sawyer in July that she was four months along with boyfriend Joel Madden's baby. Due in January, Richie, 26, has said she doesn't know the sex of her baby – though she's received several gifts in the blue hue.

Jennifer Lopez accessorizes her evening gown at the Movies Rock concert on Dec. 2 with an ever-growing baby bump. And it looks like double happiness for the singer and her husband Marc Anthony, who fueled speculation that they're expecting twins after getting matching pink and blue Tuni amp G onesies from the actress' sister Lynda.

It's baby no. 3 for Cate Blanchett, who confirmed in November that she's adding to her brood. Due in April, the actress – here at the AFI Awards in Australia on Dec. 6 – already has two boys, Dashiell, 6, and Roman, 3, with husband Andrew Upton.