Hollywood's Cutest Mom-to-Be 'Bumpies'

From Christina Aguilera and Stacy Keibler to Alyssa Milano and Olivia Wilde, see who charted their road to motherhood with a series of revealing self-portraits


"Happy 1st Day of Summer!" wrote the singer after posting a sweet selfie on Twitter of her growing bump. Already mom to Max, 6, Aguilera proves she's got this mom-to-be thing down. "I'm really excited to meet our baby girl. This has been a very easy and enjoyable pregnancy," she told PEOPLE.